Man Lu PhD, Presenter: Nothing to Disclose

Zhiqing Cai, Abstract Co-Author: Nothing to Disclose

Jun Song, Abstract Co-Author: Nothing to Disclose

Bin Song MD, Abstract Co-Author: Nothing to Disclose

Recently, transabdominal ultrasonography with a gastrointestinal contrast agent has been used widely in China to detect digestive disorders. Double Contrast Enhanced Ultrasonography (DCUS) combines both a gastrointestinal luminal contrast agent with an intravenous contrast agent for imaging of lesions.The purposes of this pilot study were to assess the value of DCUS in the preoperative diagnosis of rectal lesions.

DCUS was performed in 227 patients ( 143 males, 84 females, mean age 60 ± 13 years) with histologically- confirmed rectal lesions. Time intensity curve (TIC) were used to measure the contrast arrival time (AT), time to peak (TP), peak intensity(PI) and area under the curve（AUC）of the lesions and normal rectal tissue.

Of the 227 patients examined, there were 232 rectal lesions ( 72 rectal adenocarcinomas, 45 adenomas and 15 inflammatry mass). The study using DCUS showed unique vascular patterns in different rectal lesions. Rectal adenocarcinoma revealed earlier AT and TP compared with normal rectal tissue (p < 0.05), earlier AT and higher PI with adenoma, earlier TP and lower PI with inflammatory mass. Rectal adenoma had lower PI compared with normal rectal tissue (p < 0.01). Rectal inflammatory mass had higher PI and earlier AT compared with normal rectal tissue. Conclusions:. DCUS is a valuable technique for differential diagnosis of benign and malignant rectal lesions in patients with pathology diagnosis. The parameters of the enhancement curves reflect the different perfusion status of the rectal lesions.  

DCUS is a valuable technique for differential diagnosis of benign and malignant rectal lesions in patients with pathology diagnosis. The parameters of the enhancement curves reflect the different perfusion status of the rectal lesions.

DCUS is a valuable technique for differential diagnosis of benign and malignant rectal lesions in patients with pathology diagnosis

Lu, M, Cai, Z, Song, J, Song, B, Double Contrast-enhanced Ultrasonography Diagnosis of Rectal Lesions with Pathologic Correlation.  Radiological Society of North America 2013 Scientific Assembly and Annual Meeting, December 1 - December 6, 2013 ,Chicago IL. http://archive.rsna.org/2013/13013857.html