OBJECTIVE: : To evaluate the added value of diffusion-weighted imaging (DWI) to T 2 weighted imaging (T 2WI) for detection of extramural venous invasion (EMVI) in patients with primary rectal cancer. METHODS: : 79 patients (50 men, 29 females, mean age 67.4 years, range 37-87 years) who had undergone rectal MRI and subsequently received surgical resection were included. The rectal MRI consisted of T 2WI in three planes and axial DWI (b-values, 0, 1000 s mm-2). Two radiologists blinded to the pathologic results independently reviewed the T 2WI first, and then the combined T 2WI and DWI 4 weeks later. They recorded their confidence scores for EMVI on a 5-point scale (0: definitely negative and 4: definitely positive). The diagnostic performance of each reading session for each reader was compared by pairwise comparison of receiver operating characteristic curves. The area under the ROC curve (AUC) was considered as the diagnostic performance. The result of a histopathological examination served as the reference standard for EMVI. RESULTS: : For both readers, the diagnostic performance was not significantly different between the two image sets (for reader 1, AUC, 0.828 and 0.825, p = 0.9426 and for reader 2, AUC, 0.723 and 0.726, p = 0.9244, respectively). CONCLUSION: : There was no added value of DWI to T2WI for detection of EMVI in patients with primary rectal cancer. ADVANCES IN KNOWLEDGE:: High-resolution T2WI alone is sufficient to assess EMVI and a supplementary DWI has no added value in patients with primary rectal cancer.
OBJECTIVE: : To evaluate the added value of diffusion-weighted imaging (DWI) to T 2 weighted imaging (T 2WI) for detection of extramural venous invasion (EMVI) in patients with primary rectal cancer. METHODS: : 79 patients (50 men, 29 females, mean age 67.4 years, range 37-87 years) who had undergone rectal MRI and subsequently received surgical resection were included. The rectal MRI consisted of T 2WI in three planes and axial DWI (b-values, 0, 1000 s mm-2). Two radiologists blinded to the pathologic results independently reviewed the T 2WI first, and then the combined T 2WI and DWI 4 weeks later. They recorded their confidence scores for EMVI on a 5-point scale (0: definitely negative and 4: definitely positive). The diagnostic performance of each reading session for each reader was compared by pairwise comparison of receiver operating characteristic curves. The area under the ROC curve (AUC) was considered as the diagnostic performance. The result of a histopathological examination served as the reference standard for EMVI. RESULTS: : For both readers, the diagnostic performance was not significantly different between the two image sets (for reader 1, AUC, 0.828 and 0.825, p = 0.9426 and for reader 2, AUC, 0.723 and 0.726, p = 0.9244, respectively). CONCLUSION: : There was no added value of DWI to T2WI for detection of EMVI in patients with primary rectal cancer. ADVANCES IN KNOWLEDGE:: High-resolution T2WI alone is sufficient to assess EMVI and a supplementary DWI has no added value in patients with primary rectal cancer.
Authors: Luc A Heijnen; Doenja M J Lambregts; Dipanjali Mondal; Milou H Martens; Robert G Riedl; Geerard L Beets; Regina G H Beets-Tan Journal: Eur Radiol Date: 2013-07-03 Impact factor: 5.315
Authors: Regina G H Beets-Tan; Doenja M J Lambregts; Monique Maas; Shandra Bipat; Brunella Barbaro; Filipe Caseiro-Alves; Luís Curvo-Semedo; Helen M Fenlon; Marc J Gollub; Sofia Gourtsoyianni; Steve Halligan; Christine Hoeffel; Seung Ho Kim; Andrea Laghi; Andrea Maier; Søren R Rafaelsen; Jaap Stoker; Stuart A Taylor; Michael R Torkzad; Lennart Blomqvist Journal: Eur Radiol Date: 2013-06-07 Impact factor: 5.315
Authors: Akitoshi Inoue; Shannon P Sheedy; Jay P Heiken; Payam Mohammadinejad; Rondell P Graham; Hee Eun Lee; Scott R Kelley; Stephanie L Hansel; David H Bruining; Jeff L Fidler; Joel G Fletcher Journal: Insights Imaging Date: 2021-08-09