Toshiaki Taoka MD, Presenter: Nothing to Disclose

Masahiko Sakamoto MD, Abstract Co-Author: Nothing to Disclose

Toshiteru Miyasaka MD, Abstract Co-Author: Nothing to Disclose

Toshiaki Akashi MD, Abstract Co-Author: Nothing to Disclose

Tomoko Ochi, Abstract Co-Author: Nothing to Disclose

Kimihiko Kichikawa MD, Abstract Co-Author: Nothing to Disclose

Takeshi Wada MD, Abstract Co-Author: Nothing to Disclose

Brain surface motion image enables assessment of the dynamics of brain surface motion. A subtraction image of pulse gated heavily T2 weighted images of different phases of cardiac cycle provides stripe pattern on the surface of the pulsating brain. Thus, lack of stripe pattern on the surface of extraaxial tumor means tumor-brain adhesion. We compared double acquisition method and single acquisition method for brain surface motion image, and evaluated the accuracy for tumor-brain adhesion in meningioma cases.

The subjects were 35 meningioma cases who were surgically treated after pre-surgical evaluation by brain surface motion imaging. Imaging consists of two sets of pulse-gated 3D fast spin echo scan with variable flip angle. In double acquisition method, the two sets of images acquired as two independent scan, and in single acquisition method, the images acquired serially as single scan. In both methods, images of systolic and diastolic phase were obtained, and subtraction was made. The double acquisition method was applied to 18 cases, and the single acquisition method was applied to 17 cases. We analyzed the presence of stripe pattern surrounding meningioma and judged degree of tumor-brain adhesion as “total (Figure; lower column)”, “partial” and “no (Figure; upper column)”, and correlated with the degree of adhesion on surgical findings.

The findings of double acquisition method agreed with surgical findings in 14 cases (77.8%), including 5 “total”, 6 “partial” and 3 “no” adhesion. While, the findings of single acquisition method agreed with surgical findings in 14 cases (82.4%), including 4 “total”, 3 “partial” and 7 “no” adhesion.

Prediction for brain/meningioma adhesion by brain surface motion imaging agreed with surgical findings in 77.8 to 82.4% of the cases, and the single acquisition methods provided presurgical information of higher accuracy about tumor-brain adhesion for meningioma. Pre-surgical evaluation for tumor-brain adhesion by brain surface motion image will provide helpful information in meningioma surgery.

Brain surface motion image enables assessment of the dynamics of brain surface motion, and pre-surgical evaluation for tumor-brain adhesion by this image will provide helpful information in meningioma

Taoka, T, Sakamoto, M, Miyasaka, T, Akashi, T, Ochi, T, Kichikawa, K, Wada, T, Brain Surface Motion Imaging by Single and Double Acquisition Method: Presurgical Prediction of Tumor-Brain Adhesion in Meningioma Cases.  Radiological Society of North America 2011 Scientific Assembly and Annual Meeting, November 26 - December 2, 2011 ,Chicago IL. http://archive.rsna.org/2011/11006025.html