Abdominal Radiology

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1
When is an upright abdomen indicated?
suspicion "free air" or bowel perf
bowel gas pattern
2
In addition to an abdominal radiograph what else would you order if concerned about a bowel perforation?
chest xray
3
How long do you have to wait in order for air to rise in non-dependent regions?
positioned for 5 minutes
4
Cupolas sign is an indication of?
pneumoperitoneum
5
What can pneumatosis intestinalis occur with?
necrotizing enterocoloitis
bowel ichemia/infarction
COPD
bowel infection
immunosuppressive therapy
6
What are the common areas that foreign bodies get lodged?
cricopharyngeal area
middle one third esophagus
lower esophageal sphincter
pylorus
ileocecal valve
7
What are the intrabdominal causes of adynamic ileus?
post op or post traumatic
post inflammatory: pancreatitis, enteritis, colitis
pain related: renal colic, epidural disease
8
What are the extra-abdominal cuases of adynamic ileus?
septicemia
metabolic dz
medications
prolonged bed rest
9
What is sigmoid vovlulus often associated with ?
chronic constipation
sigmoid twists on self d/t redundant sigmoid mesentary
dramatically dilated sigmoid
10
What is the first line imaging for acute abdominal pain?
flat and upright abdomen with PA CXR
11
What appears black on ultrasound?
no reflection of sound waves- water
12
What appears shades gray/white on US?
some reflection of sound wave- organs
13
What appears white on US?
total reflection of sound wave- air in gut, bone, calcifications/stones
14
When can you visualize a beating heart on US?
6 weeks
15
Best US view for viewing female anatomy and pathology?
transabdominal and transvaginal
16
What can obstetrics US show?
pregnancy location
pregnancy age
pregnancy complication
17
What are some pregnancy complications?
developmental abnormalities
placenta previa
placenta abruption
placental insufficiency
18
What can you see on US in the 1st trimester?
yolk sac
embryo/fetus
presence of cadiac activity
19
When is the yolk sac seen? How long does it persist?
5 weeks GA and persists to 11-12 weeks
20
Where should the placenta be?
high up in the uterus
21
What is the disease in which the placenta has moved to an abnormal position?
placenta previa
22
What other things can be viewed on US?
ovarian cyst
ovarian abscess
ovarian torsion
uterine fibroids
endometriosis
molar pregnancy
23
What is shows on US when a molar pregnancy is present?
cluster grapes/snow storm
24
What is the standard of care for urinary tract examination?
CT-urography
25
Which imaging is when contrasted injected into bladder with force reflux into ureters and pelvialyceal system; often with endoscopic procedure?
retrograde pyelogram
26
Which imaging is used to detect ureterovesicular reflux by using dye through a catheter into the bladder fluoroscopic images during voiding?
voiding cystourethrogram
27
Which imaging is used in trauma cases to detect urinary extravasation?
cystography
retrograde urography
28
For an intravenous pyelography which conditions will be relatively contraindicated for IV contrast?
DM
serum creatinine > 2 mg/dl
chronic kidney disease
29
What is the study of choice for renal colic?
non contrast spiral CT
30
You dont need contrast in evaluating what with CT?
renal parenchymal hemorrhage
nephrolithiasis
31
Which study is poor in renal evaluation?
MRI
32
When is gadolinium contrast contraindicated?
nephrogenuc systemic fibrosis
stage 4 or 5 CKD
kidney transplant patient
33
If you were to use MRI to evaluated the kidney what would you use it for?
diagnosing renal artery stenosis
distinguishing between the renal cortex from medulla
staging renal cancer
evaluation of renal cysts or solid lesions
34
Are radionuclide studies functional or diagnostic? What are they used for?
functional
measure GFR/kidney function
35
Ultrasound for male GU imaging is good for?
scrotal imaging
differentiating between testis and epididymis
identifying testicular torsion
hydrocele vs varicocele
hernia
36
US for male GU can also be used to do what for prostate ?
localize areas for biopsy
37
What is a transrectal US (TRUS) used for?
identify and stage prostate cancer
directing biopsy
38
What is minimal imaging done for trauma?
flat and upright abd w/ PA CXR
39
What is the new standard of care for evaluating abdominal trauma?
CT
40
What is the test of choice for upper GIB?
endoscopy
41
What is the first line imaging for lower GI bleed?
proctosigmoidoscopy
42
What can be used for smaller GI bleeds or difficulty localizing?
tagged RBC study
43
What is concerning/abnormal with the abdomen in neonates?
gasless abdomen
44
What is another sign of pathology in pediatric abdomens?
thick walls/dispaced loops
45
What is missing in pediatric in abdominal imaging until they are about 6 months old?
haustra
46
What age group is pyloric stenosis most common and what causes it?
4-6 weeks old
hypertrophy of pyloric muscle resultant from inherited disorder of metabolism
47
What is a common sign of pyloric stenosis?
projectile vomiting
48
What is the imaging of choice for pyloric stenosis?
abdominal US
49
US is the primary imaging study for?
OB/GYN
GB
Liver
renal
aorta
50
What are some common signs of small bowel obstruction?
dilate loops of small bowel
air fluid levels
no gas in colon
51
What will you see with colonic obstruction?
marked dilation of entire colon
52
Air under the diaphragm could indicate?
perforated duodenal or gastric ulcer
colonic perforation
following laparotomy or laparoscopy
recent percutaneous gastostomy tube placement
53
For intussusception which study is used and often diagnostic and therapeutic?
barium or air contrast enema
54
When should you avoid a barium or air contrast enema when treating intussusception?
if patient has possible peritonitis
55
What is bedside US used for?
identify free peritoneal fluid
measurement of cross sectional abdominal aortic diameter
intrauterine/ectopic pregnancy
gynecological pathologies
cholelithiasis
dilated common bile duct
pericholecystic fluid
hydronephrosis
evaluation of IVC collapse
56
When is a FAST examination done?
to evaluate for major intraperitoneal bleeding
pericardial tamponade
pneumothorax/hemothorax
57
What are the major types of abdominal trauma?
MVA
falls
assault
58
What is a common finding/problem in children or mentally handicapped adults?
foreign body ingestion
59
What is the most sensitive and specific imaging for appendicitis?
CT scan
60
Which imaging is better to view perianal fistulous tracts?
MRI
61
What imaging is better to view abscesses?
CT
62
What imaging is done for diverticulitis?
contrast-enhanced abdominal and pelvic ct scan
63
When would you do an endoscopy with diverticulitis?
when you want to evaluate for associate colorectal cancer
64
CT is favored due to?
speed
availability
cheaper
65
When is abdominal angiography used?
used to assess:
trauma
GI hemorrhage
vasculitis
ASCVD
66
What does abdominal angiography require to be done?
IV contrast dye injected directly into vessel(s) being studied
67
Which study enters the duodenum, allows for visualization and injection of contrast into the common bile duct and pancreatic ducts?
ERCP
68
What is the study of choice for gallbladder and biliary tract?
US
69
What are some limitations with viewing the gallbladder with ultrasound?
skill and experience of operator
patient is obese
ascites
distended bowel
70
What study is done for acute cholecystitis?
HIDA scan
71
When is a endoscopic retrograde choloangiopancreatography indicated?
removal or common bile duct stones
diagnostic brushings if biliary stricture noted
72
What happens during an ERCP?
endoscopy with common bile duct cannulated via ampulla of vater and cholangiogram performed with fluoroscopy
73
What is the inital test done when malignancy is suspected in the galllblader, extrahepatic biliary system or head of the pancreas?
CT
74
CT can also be used for evaluation of?
obstructive jaundice
75
Mangetic resonancy cholangiopancreatography are used for which 2 diseases?
biliary tract disease
pancreatic disease
76
PET scanning is used for what in GI cancer?
initial staging
restaging after therapy
77
Which GI diseases would you want to use barium studies for?
hiatal hernia
gastroesophageal reflux
reflux esophagitis
ulcerations
barrett's esophagus
strictures
metaplasia
neoplasms
78
What are the intraluminal lesions?
polyp
FB
exophytic tumor
79
Mucosal diseases include?
ulcerative disease
gastroenteritis
80
Which GI lesions appear as extraluminal projections?
ulcerations
diverticula
81
How are disorders of the esophagus imaged?
contrast administration then fluoroscopy
82
Which contrast is typically used for upper GI series?
barium or air
83
If perforation is suspected what should be given instead of barium for upper GI series?
water soluble contrast
84
What is the prep for upper GI series?
NPO 8-12 hours prior to study
85
A double contrast study for a GI series involves?
gas producing crystals and barium
86
What is an antegrade small bowel series?
given after standard upper GI series
patient given second dose of contrast
serial abdominal fils at 15-30 minute intervals to eval small bowel
87
Which study is performed by introducing barium and air directly into the small intestine just past the duodenal jejunal junction via naso-intestinal tube?
enteroclysis
88
What is a benefit of enteroclysis?
allows direct visualization w/o causing stomach or duodenal distention
89
Which study is the introduction of barium and/or air into the colon via rectal tube with subsequent visualization via films/fluoroscopy?
barium enema
90
When is double contrast indicated in a barium enema?
intraluminal and mucosal disease (polyps, ulcers)
91
When is a barium enema indicated?
colon inflammatory diseases
neoplasm
ulcerative colitis
granulomatous colitis
92
What are some alternatives to barium enema?
colonoscopy
virtual colonscopy
93
benefit of colonscopy vs barium enema?
allows direct visualization
94
Colonoscopy disadvantages?
more expensive
more uncomfortable
95
What conditions cause too little bowel gas?
enlarged abdominal organs
intra-abdominal tumor
fluid filled intestines
gastroenteritis
neurological defect
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