[CT findings of the irradiated intestinal wall: comparison of early vascular phase and delayed equilibrium phase].
The intestinal walls of the irradiated pelvic tumor cases of 20 patients were studied. CT manifestations of the irradiated intestinal wall were examined at the early vascular phase (examined 40 seconds after the injection of contrast medium by helical scan) and at the delayed equilibrium phase (examined 4 to 5 minutes after the injection of contrast medium by rapid sequence scan). Two characteristics were identified: intestinal wall thickening and a three-layered pattern. The former was better depicted on equilibrium phase, whereas the latter was clearer on early vascular phase. Differences in visualization of the wall thickening on vascular phase and delayed phase were statistically significant. The three-layered pattern was considered to suggest severe inflammatory edematous change of the intestinal wall. Early enhancement of the mucosal and muscular-serosal layers with less enhancement of the submucosal layer, and homogeneous distribution of the contrast medium to the interstitium on delayed phase were considered to be the reason.
Department of Radiology, Jichi Medical School.
M
M
Kikuno
K
K
Takahashi
T
T
Shinozaki
M
M
Nakazawa
T
T
Sugawara
M
M
Furuse
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media / Q000493:pharmacokinetics; D005260:Female; D006801:Humans; D007422:Intestines / Q000000981:diagnostic imaging* / Q000473:pathology / Q000528:radiation effects*; D008297:Male; D008875:Middle Aged; D010386:Pelvic Neoplasms / Q000532:radiotherapy; D011878:Radiotherapy / Q000009:adverse effects*; D011879:Radiotherapy Dosage; D014018:Tissue Distribution; D014057:Tomography, X-Ray Computed
D003287:Contrast Media