Uncategorized

Both the  positive and negative teach many lessons

Davidoff

Look at the forces and energies that drive the world and you will stand in awe.

Davidoff

Outline

First principles ? physical forces chemical radiational electrical

forces in structure ? size shape position and character links and connections then by organ system

forces in function receiving processing exporting control protection storage growth reproduction then by organ system

forces in disease inflammation infection neoplasm mechanical trauma metabolic circulatory inherited functional then by organ system

forces in diagnosis clinical lab imaging then by organ system

forces in treatment surgery medicine then organ system

Principles

The particles of the universe are in constant motion ? tumbling spinning and interacting in both chatic and in orderly fashions.  The speed with which they move about relates to the energy they have ? and is directly related to the heat that they contain.  As they move about they interact with one another based on forces in the environment and forces that are innate.  The forces may be attractive or repulsive in nature.  The electrical forces of negative ands positive make the most intuitive sense.  Opposite electrical forces attract and similar forces repel.

Fundamental Forces

Electrical Force

Positive and Negative
84154b04.699 positive and negative extreme states black and white Davidoff art Davidoff MD

Gravity

The force of garvity is a fundamental force causing every structure in the universe to be attracted to every other structure

Mechanical Forces
84232p.800 water fountain motor force wind gravity potential energy kinetic energy gravitational force Cambridge Massachusetts Davidoff photography

Specific Gravity

Acute Cholecystitis Caused by Cholesterol Crystals
77753c03.8s young female right upperquadrant tenderness RUQ gallbladder echogenic irregular fluid fluid layer conforming to the shape of the gallbladder wall thickened linear echoes floaters crystalline SG less than bile cholesterol crystals specific gravity forces space cholelithiasis stones small acute cholecystitis USscan ultrasound Courtesy Ashley Davidoff MD For Radiologists and Detectives

Strong Nuclear Force

This force is responsible for holding positively charged protons together in the nucleus of the atom superceding the repulsive forces of similalrly charged particles.

Strong Nuclear Forces

Positive Forces ?  Attraction in the Nucleus
84154b05.800 positive and negative extreme states black and white strong nuclear forces Davidoff art Davidoff MD
GravityReflection
73417pb01 mirror image forces through reflection water plants reflection opposites ying yang water drops gravity flower Purity Springs New Hampshire Davidoff photography Davidoff MD
Tear Drop
02504pb03 water droplets window glass teardrop shape Davidoff photography water

Gravity

Ascites Collecting in the Most Posterior Part of the Peritoneal Cavity
71941c01 cul de sac pararectal space fluid water ascites forces gravity dependancy most posterior part of the peritoneal cavity anatomy position size space rectum seminal vesicles Davidoff MD
Pleural Effusions

Collecting in the Most Posterior Part of the Pleural Cavity
49454 lung pleura effusions bilateral pleural effusions compressive atelectasis left atrial enlargement coronary artery calcification congestive heart failure CHF CTscan Davidoff MD
Fluid Fluid Level ? Milk of Calcium Urine
16045 kidney renal nephrolithiasis fx calcifications calcified fluid fluid level dx milk of calcium urine CTscan Davidoff MD 16046b01 16046
Is the stone in the Bladder or Ureter? Use of Gravity
16046 urinary bladder fx calcification calcified lying posterior and midline dx recently passed stone CTscan Davidoff MD 16046 16046b01

Hydrostattic Forces

Droplets on Leaves
65423 leaves leaf water droplets rain forces green shape sphere cohesion Davidoff MD Davidoff photography
Tulips in a Vase
Created by Abby Rischin PhD ? Step into Art program ? Newton Mass 80238pb04 Davidoff photography 

Gravitational Forces

Waterplants after the Rain
73417p water plants reflection water drops gravity flower Purity Springs New Hampshire Davidoff photography Davidoff MD

Gravity

Pressure Radius Tension

Pressure Tension Radius Laplace?s Law
This image shows a famous cardiologist, Dr Jonathan Fisher performing as Zippy the clown revealing and exaggerating the difficulty with surface tension and radius in the early stages of blowing up a balloon. Courtesy Ashley Davidoff MD. 60730b01 code lung physiology balloon surface tension surfactant alveolus alveoli radius principles

Chemical Forces

PH probe
49462 chest esophagus PH probe intraoperative monitoring for aspiration of stomach contents CXR plain X-Ray of the chest Davidoff MD

Electrical

System of Wires Nerves and Autonomic Ganglia
In this scene of Johannesburg taken from the highway, we can view the vital lines of electrical energy that are essential to maintain the city. In the distance we see the city that the electrical lines serves.  We also see other elements that have biological equivalents.  ? the fence that protects and prevents and forms a border between the highway and the property of the homes that reside on the other side.  An old goldmine dump to the left of the picture ? the tall post office tower for communication and a host of office buildings for collaborative effort. 57692 city electricity air energy essential community need Johannesburg South Africa fence capsule tcv the common vein Davidoff photography83925 elctricity node ganglion nerve control telephone cable box connections communication control systems nerves Davidoff photography

Radiational Forces

XRT ? Radiation Effects on the liver
22975 Courtesy Ashley Davidoff MD code liver fx density straight border dx breast carcinoima dx radiation hepatitis imaging radiology CTscan DB

 

Action Reaction

Left Upper Lobe Obstruction Collapse and Compensatory Forces
49460c03 respiratory system lung left upper lobe fx atelecatsis compensation mediastinal shift lung shift volume loss plain CXR chest X-ray popcorn calcification Davidoff MD 49460c02.800

Forces in Structure

Size

Pressure Tension Radius Laplace?s Law
This image shows a famous cardiologist, Dr Jonathan Fisher performing as Zippy the clown revealing and exaggerating the difficulty with surface tension and radius in the early stages of blowing up a balloon. Courtesy Ashley Davidoff MD. 60730b01 code lung physiology balloon surface tension surfactant alveolus alveoli radius principles

Shape

Position and Space

Pleural Effusions
49454 lung pleura effusions bilateral pleural effusions compressive atelectasis left atrial enlargement coronary artery calcification congestive heart failure CHF CTscan Davidoff MD

Vaccuum

Ex Vacuo Force
49675c01 brain cerebrum cerebral frontal lobe parietal lobe young woman hx of brain trauma after MVA fx focally dilated right anterior ventricle volume loss frontoparietal region dx trumatic brain injury with gliosis volum loss and ex vacuo changes CTscan Davidoff MD
Stroke ? Muscular Force in Disease

In this unfortunate 60 year old a stroke which is seen in the high superior and anterior frontal lobe as a low density abnormality in a, overlaid in green in b, resulted in a significant functional defect including spastic deformity and functional loss of the left arm and hand.

48641c01.800 60 year old male brain area of decreased attenuation in the superior anterior frontal laobe fx encephalomalacia dx chronic infarction CTscan 3 D resurface rendering Courtesy Ashley Davidoff MD

Character

Links and Connections

Tensile Strength
84574p.800 flower forces tensile strength web water droplet triangle shape Davidoff photography Davidof MD

Trapped Forces

Abscess in the Gallbladder Fossa s/p Cholecystectomy

The CTscan represents an abscess in the post operative bed of a patient who had undergone cholecystectomy.  The post op fossa and abscess has  the same pyriform shape as the gallbladder and contains a fluid collection with bubbles of air characteristic of an infection with anerobic organisms.  the bubbles although floating to the top are not quite free to form an air fluid layer indicating complex fluid probably with thick pus and fibrinous strands.  Percutaneous drainage is indicated.

of a different type 77668.8s gallbladder gallbladder fossa s/p cholecystectomy skin bile duct stent air fluid air fluid level s/p cholecystectomy abscess in post operative bed CTscan Courtesy Ashley DAvidoff MD copyright 2008

 

Forces in Function

CVS

Pressure Tension Radius Laplace?s Law
This image shows a famous cardiologist, Dr Jonathan Fisher performing as Zippy the clown revealing and exaggerating the difficulty with surface tension and radius in the early stages of blowing up a balloon. Courtesy Ashley Davidoff MD. 60730b01 code lung physiology balloon surface tension surfactant alveolus alveoli radius principles

Muscular Forces

CVS

Contractile Forces Presssure Gradients

Normal Pressures
49483b01 heart cardiac LV left ventricle aorta aortic systemic circulation capillary capillaries arterioles venules right atrium RA right ventricle RV normal physiology pressures hemodynamics Davidoff MD Davidoff art

Normal (a,c) and Aortic Stenosis with Post Stenotic Dilatation (b,d)
07969c06 heart aorta left ventricle LV normal anatomy fx hypercontractile ballet slipper ejection fraction = 80% AV aortic valve thickened doming ejection click jet turbulence shear stress post stenotic dilalation dilitation LV angiogram angiography Courtesy Ashley Davidoff MD aortic valve 07969c03 07969c02 07969c04

Aortic Valve Open in Systole (a) and Closed in Diasttole (b)
17512c02.800 thorax aortic valve normal anatomy physiology systole diastole aortic valve open closed 3 cusps thoracic aorta ascending aorta Courtesy Ashley Davidoff MD

Cardiac Systole ? Aortic Valve Opened
71610.800 heart cardiac aorta aortic valve replacement AVR pacemaker time systole valve open plain film of the chest CXR Davidoff MD
Wiggers Diagram ? Pressures in th Cardiovascular System
33808b.800 heart cardiac physiology pressure EKG ECG pressure curves diagram LV aorta LA left atrium left ventricle systole diastole acv waves Davidoff MD

GIT

PH probe
49462 chest esophagus PH probe intraoperative monitoring for aspiration of stomach contents CXR plain X-Ray of the chest Davidoff MD

GUT

Urinary Bladder ? Pre Void and Post Void  
71687c01 urinary bladder pre void 100ccs post void urinary voiding function muscle contraction USscan Davidoff MD
Coordinated Muscular Forces
80753pb01.800 Dancers Arielle Davidoff art Davidoff photography Courtesy Ashley Davidoff MD
Running
64163b01 health youth age time physiology boy running happy davidoff photgraphy Davidoff MD

Forces in Disease

Inflammation ? Transudation ?

Transudation and Exudation
71695c02 colon splenic flexure fx fat induration dirty fat Gerotas fascia lateral conal fascia thickened thickening of the interstitium acute inflammation inflammatory exudate diverticulitis large bowel CTscan Davidoff MD 71695c01

Infection

Loculated Air in Empyema ? Air = infection in this Instance
71441c01 lung pleura air air bubbles forces gravity fibrin complex loculated thickened pleura pleural thickening fluid accumulation trapped air dx empyema CTscan Davidoff MD
Air Trapped by Fibrin ? Implications 
46308 skull maxillary sinus fx air fluid level fx air bubbles fx complex fluid dx acute sinusitis CTscan maxillofacial Davidoff MD

Neoplasia and Other Growth Disorders

Atrophy and Ex Vacuo changes
71411c01.801 74 male with mental status changes brain cerebrum cerebral fx gliosis volume loss enlargement lateral ventricle on left encephalomalacia dx superior left frontal lobe parietal lobe in the territory of the left MCA left middle cerebral artery dilated left lateral ventricle due to tissue atrophy pull push force ex vacuo change asymmetry a= CTscan b = DWI ? negative c= FLAIR d= FLAIR coronal e = T2 weighted image f = T2 weighted image MRI Davidoff MD 71411c01.800

Mechanical

Weakened Resistance

Pathological Fracture
49471c03 bone hx male with history of metastatic lung carcinoma bone femur femoral neck fx fracture fx osteolytic bone lesion in neck dx pathological fracture artery atherosclerosis CTscan Davidoff MD 49471c032

Disease and Healing

Boxers Fracture 15 year old ?  Healing 4 Weeks Later
72175c01.800 15 year old with pain after punching bone hand 5th metacarpal fracture growth plates epiphyses epiphysis Boxer?s fracture four weeks later 4 weeks healing osteoid periosteal reaction osteoclastic activity periosteum plain X-ray plain film Davidoff MD
Healing
49464 bone femur fx healed fracture compensation total knee replacement plain X-Ray Davidoff MD 49465

Circulatory Disease

Opposite Forces

Yin Yang Sign of Flow Reversal
60438.800 s/p catheterization with painful pu;satile hematoma with new bruit artery femoral artery fx yin yang sign aka ying yang turbulent flow dx pseudoameurysm false aneurysm USscan color flow doppler red blue Davidoff MD
Pressure Tension Radius Laplace?s Law
This image shows a famous cardiologist, Dr Jonathan Fisher performing as Zippy the clown revealing and exaggerating the difficulty with surface tension and radius in the early stages of blowing up a balloon. Courtesy Ashley Davidoff MD. 60730b01 code lung physiology balloon surface tension surfactant alveolus alveoli radius principles
Normal aorta and Abdominal Aneurysm ? Pressure Tension and Laplace?s Law
70027c01 aorta abdomen abdominal aortic aneurysm normal aorta TCV applied biology AAA USscan Davidoff MD

Compressive Forces

Pleural Effusions ? Compressive Atelectasis
49454 lung pleura effusions bilateral pleural effusions compressive atelectasis left atrial enlargement coronary artery calcification congestive heart failure CHF CTscan Davidoff MD

Mechanical Disease

Venturi Effect
Flow in this tube is demonstrated by the arrows going from right to left through a narrowingin the tube (red) demonstrating a vacuum or suction effect caused by the sudden acceleration of the fluid as it goes through the narrowing or stenosis. This is seen in the U shaped monometer with the fluid level in blue being relatively higher at the site of the stenosis in relation to the pressure more upstream. The suction phenomenon is kown as the Venturi effect is seen in IHSS where the narrowing of the LVOT causes a vacuum effect on the anterior leaflet of the MV resulting in mitral regurgitation. The Venturi effect is also utilised in the functioning of carburettors in fuel driven engines. 34807b05 code heart cardiac SAM IHSS pressure drop vacuum suction acceleration stnosis Venturi effect tube principles

Mechanical Forces

Obstructive

13 mm Stricture in Esophagus Causing Obstruction
49430c01 esopagus GE junction stricture hiatis hernia barium swsllow upper GI size Davidoff MD
Stroke ? Muscular Force in Disease

In this unfortunate 60 year old a stroke which is seen in the high superior and anterior frontal lobe as a low density abnormality in a, overlaid in green in b, resulted in a significant functional defect including spastic deformity and functional loss of the left arm and hand.

48641c01.800 60 year old male brain area of decreased attenuation in the superior anterior frontal laobe fx encephalomalacia dx chronic infarction CTscan 3 D resurface rendering Courtesy Ashley Davidoff MD

Traumatic Forces

Normal and Abnormal

Falling on the Outstretched Hand ? Colle?s Fracture
70034c03 bone radius ulna wrist dorsally angulated fracture of distal radial metaphysis 2-3 cm proximal to wrist joint,sometimes associated frx of ulnar styloid frx line is almost always on volar side dx Colle?s fracture plain X-ray plain film of wrist normal wrist 70034c03 70034c04 Davidoff MD

Acute Traumatic Injury with Floor of Orbit and Roof of Maxillary Sinus Fracture

Footprints of the Path of the Force
48729c01 bone face skull inferior orbital wall maxillary sinus air fluid level blood swelling fracture skin edema bruise trauma forces 3D volume rendering CTscan Davidoff MD

Systems

Forces in Diagnosis

Reflection Transmission Shadowing
70026 gallbladder stones shadowing forces reflection transmission dx cholelithiasis USscan Davidoff MD

Gravity

Fluid Fluid Level ? Milk of Calcium Urine
16045 kidney renal nephrolithiasis fx calcifications calcified fluid fluid level dx milk of calcium urine CTscan Davidoff MD 16046b01 16046

Role of Gravity in Diagnosis

Small Bowel Supported by Mesentery in a Patient with Ascites
72564.800 small bowel mesentery support ascites fluid floating small bowel USscan Davidoff MD
Is the stone in the Bladder or Ureter? Use of Gravity
16046 urinary bladder fx calcification calcified lying posterior and midline dx recently passed stone CTscan Davidoff MD 16046 16046b01

Velocity and Direction

Velocity Direction Dopppler
60650 iliac artery doppler one toward and one away relative position depending on the observer perception deduction USscan Davidoff MD

Lack of Forces ? No Protons in Air

Air in a Brain Abscess ? T1 T2 FLAIR GRE
71604.c02b 40 year old female with headache brain maxillary sinus frontal lobe fx air fluid level parafalcine falx cerebri a= T1 weighted b= T2 weighted c = FLAIR d= GRE dx left maxillary sinusitis with brain abscess air fluid level thickened mucosa of maxillary sinus MRI Davidoff MD 71604.c02 71604.c03 71604.c04 71604.c02b

Tension Pneumothorax in the Supine Position
24149 hx 65M s/p multitrauma presents to radiology to evaluate abdominal pain chest lung mediastinum fx expanded left lower lobe LLL fx lucent fx mediastinal shift mediastinum fx deep sulcus sign dx tension pneumothorax scout film CTscan imaging radiology radiologists and detectives 5star Courtesy Ashley Davidoff MD 24149 24150 24151 24152 24153

Deep Sulcus Sign No Evidence of Tension due to Pneumonia
44666 chest lung CXR fx deep sulcus sign pneumothorax PTX supine projection fx RLL pneumonia imaging radiology Courtesy Ashley Davidoff MD

 

Second text

Positive and Negative Force and The Common Vein

Units, bonds and driving forces in the context of space and time are part of world in and  around us.

Units bonds and driving force for wholeness

Two Opposite Forces Attract but Do Not Negate Each Other

Gravity

The force of garvity is a fundamental force causing every structure in the universe to be attracted to every other structure

Mechanical Forces84232p.800 water fountain motor force wind gravity potential energy kinetic energy gravitational force Cambridge Massachusetts Davidoff photography

Water Driven Mill

89045p water mill gravity force power river Disney World Magic Kingdom Davidoff photography

Strong Nuclear Force

This force is responsible for holding positively charged protons together in the nucleus of the atom superceding the repulsive forces of similalrly charged particles.

Strong Nuclear Forces

Positive Forces ?  Attraction in the Nucleus

84154b05.800 positive and negative extreme states black and white strong nuclear forces Davidoff art Davidoff MD

Gravity

Reflection73417pb01 mirror image forces through reflection water plants reflection opposites ying yang water drops gravity flower Purity Springs New Hampshire Davidoff photography Davidoff MD

Tear Drop02504pb03 water droplets window glass teardrop shape Davidoff photography water

Hydrostattic Forces

Droplets on Leaves65423 leaves leaf water droplets rain forces green shape sphere cohesion Davidoff MD Davidoff photography

Tulips in a VaseCreated by Abby Rischin PhD ? Step into Art program ? Newton Mass 80238pb04 Davidoff photography 

Gravitational Forces

Waterplants after the Rain73417p water plants reflection water drops gravity flower Purity Springs New Hampshire Davidoff photography Davidoff MD

Gravity

Fluid Fluid Level ? Milk of Calcium Urine
16045 kidney renal nephrolithiasis fx calcifications calcified fluid fluid level dx milk of calcium urine CTscan Davidoff MD 16046b01 16046
Is the stone in the Bladder or Ureter? Use of Gravity
16046 urinary bladder fx calcification calcified lying posterior and midline dx recently passed stone CTscan Davidoff MD 16046 16046b01

Pressure Radius Tension

Pressure Tension Radius Laplace?s LawThis image shows a famous cardiologist, Dr Jonathan Fisher performing as Zippy the clown revealing and exaggerating the difficulty with surface tension and radius in the early stages of blowing up a balloon. Courtesy Ashley Davidoff MD. 60730b01 code lung physiology balloon surface tension surfactant alveolus alveoli radius principles

Chemical Forces

Electrical

System of Wires Nerves and Autonomic GangliaIn this scene of Johannesburg taken from the highway, we can view the vital lines of electrical energy that are essential to maintain the city. In the distance we see the city that the electrical lines serves.  We also see other elements that have biological equivalents.  ? the fence that protects and prevents and forms a border between the highway and the property of the homes that reside on the other side.  An old goldmine dump to the left of the picture ? the tall post office tower for communication and a host of office buildings for collaborative effort. 

57692 city electricity air energy essential community need Johannesburg South Africa fence capsule tcv the common vein Davidoff photography

83925 elctricity node ganglion nerve control telephone cable box connections communication control systems nerves Davidoff photography

 

Cardiac Systole ? Aortic Valve Opened
71610.800 heart cardiac aorta aortic valve replacement AVR pacemaker time systole valve open plain film of the chest CXR Davidoff MD

Radiational Forces

XRT ? Radiation Effects on the liver22975 Courtesy Ashley Davidoff MD code liver fx density straight border dx breast carcinoima dx radiation hepatitis imaging radiology CTscan DB

 

Action Reaction

Forces in Structure

Size

Pressure Tension Radius Laplace?s LawThis image shows a famous cardiologist, Dr Jonathan Fisher performing as Zippy the clown revealing and exaggerating the difficulty with surface tension and radius in the early stages of blowing up a balloon. Courtesy Ashley Davidoff MD. 60730b01 code lung physiology balloon surface tension surfactant alveolus alveoli radius principles

Shape

Position and Space

Vaccuum

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Vaccuum

Ex Vacuo Force
49675c01 brain cerebrum cerebral frontal lobe parietal lobe young woman hx of brain trauma after MVA fx focally dilated right anterior ventricle volume loss frontoparietal region dx trumatic brain injury with gliosis volum loss and ex vacuo changes CTscan Davidoff MD

Character

Links and Connections

Tensile Strength84574p.800 flower forces tensile strength web water droplet triangle shape Davidoff photography Davidof MD

Trapped Forces

Forces in Function

CVS

Muscular Forces

CVS

Contractile Forces Presssure Gradients

Normal Pressures49483b01 heart cardiac LV left ventricle aorta aortic systemic circulation capillary capillaries arterioles venules right atrium RA right ventricle RV normal physiology pressures hemodynamics Davidoff MD Davidoff art

Normal (a,c) and Aortic Stenosis with Post Stenotic Dilatation (b,d)

07969c06 heart aorta left ventricle LV normal anatomy fx hypercontractile ballet slipper ejection fraction = 80% AV aortic valve thickened doming ejection click jet turbulence shear stress post stenotic dilalation dilitation LV angiogram angiography Courtesy Ashley Davidoff MD aortic valve 07969c03 07969c02 07969c04

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Aortic Valve Open in Systole (a) and Closed in Diasttole (b)
17512c02.800 thorax aortic valve normal anatomy physiology systole diastole aortic valve open closed 3 cusps thoracic aorta ascending aorta Courtesy Ashley Davidoff MD

Wiggers Diagram ? Pressures in th Cardiovascular System33808b.800 heart cardiac physiology pressure EKG ECG pressure curves diagram LV aorta LA left atrium left ventricle systole diastole acv waves Davidoff MD

GIT

GUT

Urinary Bladder ? Pre Void and Post Void  
71687c01 urinary bladder pre void 100ccs post void urinary voiding function muscle contraction USscan Davidoff MD

Coordinated Muscular Forces80753pb01.800 Dancers Arielle Davidoff art Davidoff photography Courtesy Ashley Davidoff MD

Running64163b01 health youth age time physiology boy running happy davidoff photgraphy Davidoff MD

Chemical Forces

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Chemical Forces

PH probe
49462 chest esophagus PH probe intraoperative monitoring for aspiration of stomach contents CXR plain X-Ray of the chest Davidoff MD

Forces in Disease

Inflammation ? Transudation ?

Transudation and Exudation

71695c02 colon splenic flexure fx fat induration dirty fat Gerotas fascia lateral conal fascia thickened thickening of the interstitium acute inflammation inflammatory exudate diverticulitis large bowel CTscan Davidoff MD 71695c01

Infection

Loculated Air in Empyema ? Air = infection in this Instance

71441c01 lung pleura air air bubbles forces gravity fibrin complex loculated thickened pleura pleural thickening fluid accumulation trapped air dx empyema CTscan Davidoff MD

Air Trapped by Fibrin ? Implications 46308 skull maxillary sinus fx air fluid level fx air bubbles fx complex fluid dx acute sinusitis CTscan maxillofacial Davidoff MD

// ul?).tabs();
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// ]]>Untitled Document

02504pb03 water droplets window glass teardrop shape Davidoff photography water

Gravity

Ascites Collecting in the Most Posterior Part of the Peritoneal Cavity
71941c01 cul de sac pararectal space fluid water ascites forces gravity dependancy most posterior part of the peritoneal cavity anatomy position size space rectum seminal vesicles Davidoff MD
Pleural Effusions

Collecting in the Most Posterior Part of the Pleural Cavity
49454 lung pleura effusions bilateral pleural effusions compressive atelectasis left atrial enlargement coronary artery calcification congestive heart failure CHF CTscan Davidoff MD
Fluid Fluid Level ? Milk of Calcium Urine
16045 kidney renal nephrolithiasis fx calcifications calcified fluid fluid level dx milk of calcium urine CTscan Davidoff MD 16046b01 16046
Is the stone in the Bladder or Ureter? Use of Gravity
16046 urinary bladder fx calcification calcified lying posterior and midline dx recently passed stone CTscan Davidoff MD 16046 16046b01
Stroke ? Muscular Force in Disease

In this unfortunate 60 year old a stroke which is seen in the high superior and anterior frontal lobe as a low density abnormality in a, overlaid in green in b, resulted in a significant functional defect including spastic deformity and functional loss of the left arm and hand.

48641c01.800 60 year old male brain area of decreased attenuation in the superior anterior frontal laobe fx encephalomalacia dx chronic infarction CTscan 3 D resurface rendering Courtesy Ashley Davidoff MD

Neoplasia and Other Growth Disorders

Atrophy and Ex Vacuo changes

71411c01.801 74 male with mental status changes brain cerebrum cerebral fx gliosis volume loss enlargement lateral ventricle on left encephalomalacia dx superior left frontal lobe parietal lobe in the territory of the left MCA left middle cerebral artery dilated left lateral ventricle due to tissue atrophy pull push force ex vacuo change asymmetry a= CTscan b = DWI ? negative c= FLAIR d= FLAIR coronal e = T2 weighted image f = T2 weighted image MRI Davidoff MD 71411c01.800

Mechanical

Weakened Resistance

Pathological Fracture49471c03 bone hx male with history of metastatic lung carcinoma bone femur femoral neck fx fracture fx osteolytic bone lesion in neck dx pathological fracture artery atherosclerosis CTscan Davidoff MD 49471c032

Action Reaction

Left Upper Lobe Obstruction Collapse and Compensatory Forces
49460c03 respiratory system lung left upper lobe fx atelecatsis compensation mediastinal shift lung shift volume loss plain CXR chest X-ray popcorn calcification Davidoff MD 49460c02.800

Disease and Healing

Boxers Fracture 15 year old ?  Healing 4 Weeks Later

72175c01.800 15 year old with pain after punching bone hand 5th metacarpal fracture growth plates epiphyses epiphysis Boxer?s fracture four weeks later 4 weeks healing osteoid periosteal reaction osteoclastic activity periosteum plain X-ray plain film Davidoff MD

Healing49464 bone femur fx healed fracture compensation total knee replacement plain X-Ray Davidoff MD 49465

Circulatory Disease

Opposite Forces

Yin Yang Sign of Flow Reversal60438.800 s/p catheterization with painful pu;satile hematoma with new bruit artery femoral artery fx yin yang sign aka ying yang turbulent flow dx pseudoameurysm false aneurysm USscan color flow doppler red blue Davidoff MD

Compressive Forces

Mechanical Disease

Venturi EffectFlow in this tube is demonstrated by the arrows going from right to left through a narrowingin the tube (red) demonstrating a vacuum or suction effect caused by the sudden acceleration of the fluid as it goes through the narrowing or stenosis. This is seen in the U shaped monometer with the fluid level in blue being relatively higher at the site of the stenosis in relation to the pressure more upstream. The suction phenomenon is kown as the Venturi effect is seen in IHSS where the narrowing of the LVOT causes a vacuum effect on the anterior leaflet of the MV resulting in mitral regurgitation. The Venturi effect is also utilised in the functioning of carburettors in fuel driven engines. 34807b05 code heart cardiac SAM IHSS pressure drop vacuum suction acceleration stnosis Venturi effect tube principles

 // ul?).tabs();
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// ]]>Untitled Document

Mechanical Forces

Obstructive

13 mm Stricture in Esophagus Causing Obstruction
49430c01 esopagus GE junction stricture hiatis hernia barium swsllow upper GI size Davidoff MD
Stroke ? Muscular Force in Disease

In this unfortunate 60 year old a stroke which is seen in the high superior and anterior frontal lobe as a low density abnormality in a, overlaid in green in b, resulted in a significant functional defect including spastic deformity and functional loss of the left arm and hand.

48641c01.800 60 year old male brain area of decreased attenuation in the superior anterior frontal laobe fx encephalomalacia dx chronic infarction CTscan 3 D resurface rendering Courtesy Ashley Davidoff MD

Traumatic Forces

Normal and Abnormal

Falling on the Outstretched Hand ? Colle?s Fracture
70034c03 bone radius ulna wrist dorsally angulated fracture of distal radial metaphysis 2-3 cm proximal to wrist joint,sometimes associated frx of ulnar styloid frx line is almost always on volar side dx Colle?s fracture plain X-ray plain film of wrist normal wrist 70034c03 70034c04 Davidoff MD

Acute Traumatic Injury with Floor of Orbit and Roof of Maxillary Sinus Fracture

Footprints of the Path of the Force
48729c01 bone face skull inferior orbital wall maxillary sinus air fluid level blood swelling fracture skin edema bruise trauma forces 3D volume rendering CTscan Davidoff MD

Systems

Forces in Diagnosis

Reflection Transmission Shadowing
70026 gallbladder stones shadowing forces reflection transmission dx cholelithiasis USscan Davidoff MD

Gravity

Fluid Fluid Level ? Milk of Calcium Urine
16045 kidney renal nephrolithiasis fx calcifications calcified fluid fluid level dx milk of calcium urine CTscan Davidoff MD 16046b01 16046

Role of Gravity in Diagnosis

Small Bowel Supported by Mesentery in a Patient with Ascites
72564.800 small bowel mesentery support ascites fluid floating small bowel USscan Davidoff MD
Is the stone in the Bladder or Ureter? Use of Gravity
16046 urinary bladder fx calcification calcified lying posterior and midline dx recently passed stone CTscan Davidoff MD 16046 16046b01

Velocity and Direction

Velocity Direction Dopppler
60650 iliac artery doppler one toward and one away relative position depending on the observer perception deduction USscan Davidoff MD

Lack of Forces ? No Protons in Air

Air in a Brain Abscess ? T1 T2 FLAIR GRE
71604.c02b 40 year old female with headache brain maxillary sinus frontal lobe fx air fluid level parafalcine falx cerebri a= T1 weighted b= T2 weighted c = FLAIR d= GRE dx left maxillary sinusitis with brain abscess air fluid level thickened mucosa of maxillary sinus MRI Davidoff MD 71604.c02 71604.c03 71604.c04 71604.c02b

Tension Pneumothorax in the Supine Position
24149 hx 65M s/p multitrauma presents to radiology to evaluate abdominal pain chest lung mediastinum fx expanded left lower lobe LLL fx lucent fx mediastinal shift mediastinum fx deep sulcus sign dx tension pneumothorax scout film CTscan imaging radiology radiologists and detectives 5star Courtesy Ashley Davidoff MD 24149 24150 24151 24152 24153

Deep Sulcus Sign No Evidence of Tension due to Pneumonia
44666 chest lung CXR fx deep sulcus sign pneumothorax PTX supine projection fx RLL pneumonia imaging radiology Courtesy Ashley Davidoff MD

https://youtu.be/nr9KrqN_lIg?t=2