title: Colorectal carcinoma: evaluation with ultrafast CT.
abstract: We investigated the value of ultrafast computed tomography for the preoperative assessment of colorectal carcinoma. Ultrafast CT demonstrated the primary tumor in 25 (89%) of 28 patients. Local tumor extension was detected with a sensitivity of 90%, a specificity of 78%, and an overall accuracy of 82%. Invasion into adjacent organs was detected with a sensitivity of 80%, a specificity of 91%, and an overall accuracy of 89%. Diagnoses of pericolic or perirectal lymph node metastasis were true-positive in ten, true-negative in 12, false-positive in one, and false-negative in two and those for distant lymph node metastasis were true-positive in four, true-negative in 24, and false-negative in one. Ultrafast CT may be more useful than conventional CT in evaluating local extension and pericolic or perirectal lymph node metastases because it avoids motion artifact.
authors.affiliation: Department of Radiology, Shonan Kamakura Hospital, Izumo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Okizuka
authors.forename: K
authors.initials: K
authors.lastname: Sugimura
authors.forename: N
authors.initials: N
authors.lastname: Shinozaki
authors.forename: K
authors.initials: K
authors.lastname: Watanabe
mesh_terms: D000328:Adult; D000368:Aged; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D011237:Predictive Value of Tests; D014057:Tomography, X-Ray Computed / Q000379:methods*