Normal Abd.CT MRI Cilinicians

93 Pages·2014·9.64 MB·English

Abdomen and pelvis
CT ANATOMY
MAMDOUH MAHFOUZ MD
[email protected]
www.ssregypt.com
CT
ABDOMEN
 Indications
 Patient preparation
 Patient position
 Scanogram

•
To assess equivocal imaging findings

•
Staging of hepatic neoplasms
•
Metastatic workup of primary malignancies
•
Diagnosis of abdominal masses
•
Assessment of biliary problems
•
Diagnosis of vascular lesions
•
Assessment of suspected post-traumatic complications
Patient preparation

Oral contrast material to opacity the
gastrointestinal tract [gastrographin
38% diluted by water to 4%]
- Timing?

Not indicated in

Acute abdominal trauma

Acute renal colic

Dehydrated patients
CT
ABDOMEN
 Indications
 Patient preparation
 Patient position
 Scanogram

No required preparation unless the patient is going to be sedated
or injected with contrast material
FASTING FOR 4 - 6 HOURS
Scanogram Frontal

10mmscan intervals [ 5mm sections are necessary

for pancreas, suprarenal glands, urinary bladder]
Window setting

 Soft tissue window
 Lung window [scans at the lung bases]
 Bone window [lesions in the spine or pelvic bones]
Patient preparation
IV contrast material [urographin,…] 60ml
•
Fasting 4-6 hours ?!
•
Pre contrast scans [ liver, kidney, urinary bladder]
•
Triphasic scan for liver [ arterial, portal, delayed]

Detailed examination
of the Superior
Mesenteric Artery and
Celiac Artery. Scan time
= 9.4 seconds. 1mm
slice thickness
Value of precontrast study
Arterial phase
Hyper vascular deposits
Value of arterial phase
images in hepatic
lesion detection