Soft tissue Exam 3 Flashcards
what are the common imaging modalities?
- US
- CT scan
- MRI
- Plain film with contrast
- fiberoptic
- GI Imaging contrast agents:
- how many are there?
- what are they?
- there are 3
- Barium/ iodinated contrast/ gadolimium
this contrast- GI mucosa and lumen
barium
this contrast is used with CT- to see vasculature, duct systems, suspected perforation of lumen, parenchyma of solid organs
Iodinated contrast
this contrast is used with MRI
Gadolinium
- what type of barium is used for morphology and motility of esophagus? what is this called?
- barium swallow
- esophogram
barium is used in the upper GI series to visualize ?
- esophagogastric junction to lig of treitz- (the end of upper GI)
barium is administered to the large bowel by?
where is the esophagus located?
- barium enema
- esophagus is located posterior to the trachea
identify
esophogus with barium contrast
when the cryophayngeal doesnt relax what does it create
- zenkers diverticulum- could be a pouch of mixed vomit
identify
zenkers diverticulum
identify
descending colon with small polyps
identify arrows
- diverticulitis in the colon
identify
pedunculated polyp inside colon
what type of radiography is used for the liver and bile ducts?
- MRI- Nuclear scintigraphy, US, CT scan
- detected acute and chronic gallbladder disease gallstones you would use _____ as first choice?
- Ultrasound
- if you were doing a “functional study” on the gallbladder- tracking the flow of bile what would you use?
- what could you dx?
- HIDA- hepatobiliary iminodiacetic acid scan AKA cholescintigraphy
- bile duct obstruction, bile leakage, GB function, gallstones, congenital abnormalities of the bile ducts
- what type of special imaging is used for the urinary tract?
- what can you see with each method?
- T/F this is the most basic radiographic study of the urinary tract.
- what type of contrast is used?
- how many minutes does it take for films to be taken?
- what does compression device over ureters prevent?
-IVP/IVU: pyelography/urography/ excretory: pyelography/urography
- IVP- you see renal parenchyma/ Excretory- you see renal calyx and urethra
- True
- Iodinated contrast
- 30 minutes
- prevents distention of proximal ureters and collecting system and produces optimal visualization
-
what is the most basic radiographic study of the urinary tract?
IVP- IVU
excretory
what are the risks of contrast?
- acute impairment of renal function after exposure to contrast
- 1- in 75000 contrast admin. result in death allergic rx.
- greater risk with intravenous delivery
what type of patients are at risk for contrast complications?
- pre-existing renal insufficiency
- insulin dep. diabetic with secondary renal dz
- repeated admin. of contrast over short period of time
- *****transplant and renal dialysis patients
- total iodine dose is greater than 100g within 24 hrs.
what kind of disease can occur with gadolinium?
deposition disease
- nephrotoxic
- carries FDA blockbox warning
- should only be used by FDA approved areas
- pt with anaphylaxis to Iodine have an increased risk to ANA with gado
this disease causes fibrosis of the skin and internal organs due to the use of gadolinium in patient with renal insufficiency.
nephrogenic systemic fibrosis- dermopathy- fibrosis in the skin
what are some indications for plain film?
- mod to severe pain
- tenderness
- trauma
- abdominal distention and pain
- vomitting, diarrhea, constipation
aorta refers pain to?
lumbar spine and abdomen
the colon refers pain to
mid lumbar spine
the gallbladder refers pain to
inferior scapula, inner scapula, right shoulder
gynecological refers pain to
lower lumbar, pelvis
kidneys uerters refer pain to
groin, flank
pancreas refer pain to
lower thoracic spine
peptic ulcer refer pain to
mid thoracic, heart area
peptic ulcer refer pain to
midl thoracic , heart area
rectum refer pain to
sacral area, left paraspinal region
sigmoid colon refer pain to?
sacral region
what does KUB stand for?
what is the definition
what is the purpose?
- kidney- ureter- bladder (is what you see)
- plain film of abdomen, scout view of abdomen
- to see hemidiaphragm, pubic symphysis- gas and fluid patterns, free air , calcifications, masses, abnormal organs,
- without contrast it would be difficult to see.
where would you see normal bowel gas?
- see it in stomach with meganblasse
- small bowel- 2-3 loops of nondistended bowle- or normal diameter- < 3cm
- large bowel- rectum and sigmoid almost always less than 5 cm
- would you find air in the stomach?
- would you find air in the small bowel?
- would you find air in the large bowel?
- how do you tell if someone is supine?
- almost always except supine
- 2 or 3 levels possible
- none normally
which one is normal- which one is supine?
left side is supine- right is upright
identify
supine air in bowels
- this may be difficult to see due to the soft tissue structures surrounded by soft tissue and fluid
- must be able to see an edge or notice displacement of surrounding structures- not able to see unless massive
organomegaly
what abnormal variant is caused by hepatomegaly?
riedel lobe- which is a tongue like projection
identify
displacement of bowel loops due to hepatomegaly
what are the abnormalities and displacements that splenomegaly causes?
- it should not project below the 12th posterior rib
- meganblase displacement is moved medial
- splenic flexure is moved inferior
- left kidney is moved inferior and medial
what are the kidney measurements for the adult?
- 10-14 cm
- no more than 1.5 cm difference side to side
- right projects shorter than the left
what are the kidney measurments for the child?
- measure from superior endplate of L1 through the inferior endplate of L4
- add 1 cm to this measurement
- this should be the length of the right kidney
- allow 1 cm differnce side to side
- kidney issues in kids is serious and shouldnt have back pain
this is the most common focal renal parenchymal lesion
this is them most common lesion in the kidney
simple renal cyst
what is the age range for a simple renal cyst?
what are the characteristics?
- under 30 is rare, found in 50% of adults over 50
- characteristics include- benign and contain serous fluids- may slowly increase- decrease in size over years/ will be seen on plain film only if calcification at peripheral rim
is the bladder visualized on plain film? if so how?
- it can be seen if full of urine
- males- round on top
- females are flat on top (due to the uterus siting on top)
explain horseshoe kidney
- could be inferior or superior fusion of poles- MC is inferior fusion
- occurs in 1-400 births
- MC renal fusion anomaly
- MC in males
- 1/3 have other anomalies- visceral or skeletal
- 1/3 asymptomatic
- kidney axis deviation can be seen on film
what are some complications that relate to horseshoe kidney?
- poor drainage- renal calculi and hydronephrosis
- infection
- certain malignancies like Wilms, TCC or carcinoid
- renovascular hypertension
- increased susceptibility to trauma
what is calxed kidney? AKA’s
what are some complications”
- fusion of both superior and inferior poles, forming a cake- donut- or “pancake kidney”
- it is rare
- complications are similiar to horseshoe
this development of the kidney is retention of lobular outer surface- residual from development.
fetal lobulation
- this feature happens when splenomegaly is present?
- dromedary hump
prominent focal bulge on the lateral border of kidney due to impression by spleen - location is LEFT kidney near spleen (NOT RIGHT)
what is the most common etiology of a mechanical small bowel obstruction?
- Post surgical adhesions
- (hernia is 2nd and neoplasms are 3rd)
when taking plain film upright what kind of air do you see?
when taking plain film recumbent what do you see?
- upright has multiple air fluid levels, step ladder appearance, dilation of bowel loop with inverted u-loops.
- recumbent- dilated loops- ladder appearance, dilated loops- stack of coins
what does the obstruction of the large bowel look like?
what sections are usually involved?
how much dilation would cause rupture?
is large bowel known for air fluid levels?
- colon dilated to the point of obstruction
- cecum is usually the most dilated segment-
- 12-15 cm may rupture
- no or very few air fluid levels
what is the most common first and second etiologies of large bowel obstruction?
- # 1 most common is colon carcinoma
- # 2 most common is diverticulitis
- 3 is cecal volvulus
- 4 is herni
identify
large bowel obstruction
what kind of large bowel obstruction is this?
cecal volvulus
- define extraluminal air in abdomen
- what are the different types?
- air outside of the bowel
- pneumoparitoneam- air in peritoneal cavity
- pneumotosis intestinalis- air in bowel
- pneumobilia- air in biliary tree due to communication with GI tract or skin.
what are the most common causes of pneumoperitoneum? (air inside the peritoneum)
- the MOST COMMON cause is SPONTANEOUS- from a perforated gastric or duodenal ulcer
- Trauma- severe external trauma to the abdomen, recent surgery, colonsocopy
- recent lararotomy/laparoscopy- 3-7 days, amount of air will decrease daily
- other- perforation from diverticula, appendix rupture, carcinoma
- what are some radiographic findings of pneumoperitoneum?
- upright?
- left lateral decubitus?
- supine?
- what is the double wall sign?
- upright- air beneath the diaphragm but on top of liver
- left lateral decubitus- air surrounding liver- liver makes good contrast
- supine- visualization of both sides of bowel wall- falciform ligament sign
- double wall sign is air on inner and outer wall- called RIGLER sign-
identify
Riglers sign- Double wall sign- air on inner and outer wall
identify
RIGLERS SIGN- DOUBLE WALL SIGN- ALSO CALLED GAS-RELIEF SIGN