CT abdomen and pelvis

CT abdomen and pelvis protocol is a general survey of

GI tract and accessory organs

indications for CT abdomen and pelvis

trauma and general concerns (nausea, vomiting)

CT abdomen and pelvis slice parameters

5.0 mm with matching interval

CT abdomen and pelvis gantry tilt

none

CT abdomen and pelvis contrast

100 ml IV contrast 3 ml/sec

CT abdomen and pelvis scan delay

6o second in portal venous phase

CT abdomen and pelvis for non trauma contrast

600 ml of oral water diluted 1 hour before scanning

CT abdomen and pelvis algorithm and window

standard: 400 WW and 40 WL

CT abdomen and pelvis slices for post processing

thin

CT abdomen and pelvis delayed images through __ for trauma patients

kidneys and bladder

CT Appendicitis indications

appendicitis, RLQ pain, elevated WBC

CT Appendicitis scan type

helical

CT Appendicitis slice parameters

3.75 mm with matching interval

CT Appendicitis gantry tilt

none

CT Appendicitis contrast IV contrast

100 ml, 3 ml/sec

CT Appendicitis scan delay

60 second in portal venous phase

CT Appendicitis oral contrast

600 ml, 40-60 minutes prior to scanning

CT Appendicitis rectal contrast

1000 ml of water with diluted contrast

CT Appendicitis algorithm

standard 400 WW and 40 WL

CT Appendicitis ___ slices should be used for post processing

thin slices

CT Liver evaluates liver for

cancer

CT Liver includes scan and re-scans in multiple phases of contrast enhancement to

differentiate between primary liver cancer, metastatic cancer, benign tumors

CT Liver slice parameters

2.5 mm with matching interval

CT Liver contrast

600 ml oral contrast 40-60 minutes before scanning

CT Liver scan 1 contrast

no IV contrast

CT Liver scan 2 contrast

30 second delay arterial phase

CT Liver scan 3

60 second scan delay portal venois phase

CT Liver scan 4

5+ minute delay, delayed phase

CT Liver IV contrast

100 ml, 3 ml/sec

CT Liver algorithm

standard 400 WW and 40 WL

CT Liver non contrast scan is baseline view of liver can be compared to

contrast enhanced phase

CT Liver arterial phase (30 sec) used for

primary liver cancers (hepatocellular carcinoma) b/c they typically have arterial blood supply

CT Liver portal venous phase (60 sec) used for

metastatic liver cancers b/c they have portal venous blood supply

CT Liver delayed phase (5 minutes) used for

hemangiomas (benign) fill with contrast

CT Pancreas additional oral contrast given to help differentiate

duodenum from pancreatic head

T/F CT Pancreas delayed phase not necessary

true

CT Pancreas scan parameters

2.5 mm with matching interval

CT Pancreas oral contrast

600 ml, 40-60 minutes prior to scanning

CT Pancreas scan 1

no contrast

CT Pancreas scan 2

30 second scan delay (arterial phase)

CT Pancreas scan 3

scan delay (portal venous)

CT Pancreas IV contrast

100 ml at 3 ml/sec

CT Pancreas algorithm

standard 400 WW and 40 WL

CT Enterography indications

crohn’s or small bowel

CT Enterography scan parameters

2.5 mm with matching interval

CT Enterography IV contrast

100+ ml at 4+ ml/sec

CT Enterography contrast delay

60 seconds

CT Enterography oral contrast

1500-2000 ml over 40-60 minutes to distend bowels

CT Enterography algorithm

standard 400 WW and 40 WL

CT Enterography administered at same time as water to stimulate emptying of the stomach to help water move into the bowels

Metoclopramide (Reglan)

CT Enterography temporarily stops peristalsis to decrease bowel motion and enhance visibility)

glucagon

CT soft tissue neck indications

mass, swelling, abscess, cancer

CT soft tissue neck slice parameters

2.5 mm with matching intervals

CT soft tissue neck contrast

100 ml IV at 3 ml/sec

CT soft tissue neck algorithm

standard 400 WW and 40 WL

CT soft tissue neck may include algorithm for

visible portions of lung. Include orbital roof through carina

CT stone protocol used to

identify stones in urinary tract

CT stone protocol stones more visible

without contrast

how is CT stone protocol different from an abdoment and pelvis?

-no contrast

-thinner slices

-only kidneys through bladder included in scan

CT stone protocol indications

renal stone, flank pain, hematuria, dysuria

CT stone protocol slice parameters

3.75 mm with matching interval

CT stone protocol algorithm

standard 400 WW and 40 WL

CT Kidneys indications

renal mass or abnormality

CT Kidneys slice parameters

3.75 mm with matching interval

CT Kidneys contrast

600 ml oral, 40-60 minutes before scan

CT Kidneys scan 1

no contrast

CT Kidneys scan 2

30 second delay (corticomedullary phase)

CT Kidneys scan 3

90 second delay (nephrographic phase)

CT Kidneys scan 4

4 minutes (excretory phase)

CT Kidneys IV contrast

100 ml, 3 ml/sec

CT Kidneys algorithm

standard 400 WW and 40 WL

CT Kidneys non contrast establish

baseline for comparison

CT Kidneys corticomedullary phase (30 sec) evaluates

renal arteries and renal cortex (receives arterial blood supply)

CT Kidneys nephrographic phase (90 sec) evaluate

nephrons

CT Kidneys excretory phase (4 mins) evaluate

renal pelvis and collecting system of kidney

CT adrenals uses scans in multiple phases to differentiate

benign adrenal tumors from adrenal cancer

CT adrenals ____ is a presentation of an adrenal tumor

abnormal hormone levels

CT adrenals adrenal glands produce what hormones for males

androgrens

CT adrenals adrenal glands produce what hormones for females

estrogens

CT adrenals indication

adrenal tumor

CT adrenals slice parameters

3.75 mm with matching interval

CT adrenals IV contrast

100 ml IV 3 ml/sec

CT adrenals scan 1

no contrast

CT adrenals scan 2

60 second delay (portal venous)

CT adrenals scan 3

15 minutes (delayed phase)

CT adrenals algorithm

standard 400 WW and 40 WL

CT adrenals commonly reduce

DFOV to 18 cm to only include adrenal glands

CT adrenals usually includes

coronal reformations

CT Urogram is for __ of urinary system

functionality and anatomy

CT Urogram scan entire collecting system during

excretory phase

CT Urogram may be used as pre-planning for

ureteral stent placement

CT Urogram may also be used to diagnose

functional and anatomical causes of recurrent stones

CT Urogram indications

hematuria, renal stone, pain

CT Urogram slice parameters

3.75 mm with matching intervals

CT Urogram oral contrast

1000 ml, 30 minutes prior to scanning

CT Urogram scan 1

no contrast

CT Urogram scan 2

4+ minute delay (excretory phase)

CT Urogram IV contrast

100 ml, 3 ml/sec

CT Urogram algorithm

standard 400 WW and 40 WL