الفهرس 
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Abstract
Trauma is one of the leading causes of death all over the world .the abdomen is one of the most common sites of the body vulnerable to be injured either due to blunt or penetrating injury. Evaluating patients who have sustained blunt or
penetrating abdominal trauma remains one of the most challenging and resource-intensive aspects of acute trauma care.
The most commonly injured organs are the spleen, liver,retroperitoneum, small bowel, kidneys, bladder, colorectum,diaphragm, and pancreas. Imaging modalities used to assess
abdominal trauma victim are plain radiographs, ultrasound and CT which has been found to be the gold standard modality.
MDCT with its high spatial resolution, 3D application and multiplanar reformations (MPR) has greatly improved the ability to detect subtle findings in abdominal trauma scans.
Dealing with MDCT necessitates the knowledge of its terminology such as: pitch, collimation, projection data,multiplanar reformation, average, maximum and minimum intensity projections, volume rendering and segmentation.
Protocols of MDCT that can be used when dealing with abdominal trauma cases should be optimized concerning the contrast material used either oral, or intravenous or rectal, the time of beginning of scanning and time of delayed scans, dealing with Foley’s catheter if present, acquisition of data and
use of 3D and multiplanar reformation applications.
Multidetector CT is an important part of the patient work-up for blunt abdominal trauma. Timely diagnosis,differentiation of vascular injuries from other findings of trauma, signs of depleted intravascular volume, and localization
of vascular injury are important to convey to the interventional radiologist or surgeons. More accurate diagnosis can be accomplished through attention to shape, attenuation, and evolution over time of areas of high attenuation, in addition to
high-quality injections of contrast material and display techniques. Understanding the physical properties of bleeding may help radiologists predict those circumstances that put patients at significant risk for rebleeding after vessel injury and thus aid in determining the necessity for interventional or surgical procedures.