Author/Editor     Dimopoulos, Johannes C. A.; Petrow, Peter; Tanderup, Kari; Petrič, Primož; Berger, Daniel; Kirisits, Christian; Pedersen, Erik M.; Limbergen, Erik van; Haie-Meder, Christine; Pötter, Richard
Title     Recommendations from Gynaecological (GYN) GEC-ESTRO Working Group (IV): Basic principles and parameters for MR imaging within the frame of image based adaptive cervix cancer brachytherapy
Type     članek
Source     Radiother Oncol
Vol. and No.     Letnik 103, št. 1
Publication year     2012
Volume     str. 113-22
Language     eng
Abstract     The GYN GEC-ESTRO working group issued three parts of recommendations and highlighted the pivotal role of MRI for the successful implementation of 3D image-based cervical cancer brachytherapy (BT). The main advantage of MRI as an imaging modality is its superior soft tissue depiction quality. To exploit the full potential of MRI for the better ability of the radiation oncologist to make the appropriate choice for the BT application technique and to accurately define the target volumes and the organs at risk, certain MR imaging criteria have to be fulfilled. Technical requirements, patient preparation, as well as image acquisition protocols have to be tailored to the needs of 3D image-based BT. The present recommendation is focused on the general principles of MR imaging for 3D image-based BT. Methods and parameters have been developed and progressively validated from clinical experience from different institutions (IGR, Universities of Vienna, Leuven, Aarhus and Ljubljana) and successfully applied during expert meetings, contouring workshops, as well as within clinical and interobserver studies. It is useful to perform pelvic MRI scanning prior to radiotherapy (Pre-RT-MRI examination) and at the time of BT (MRI examination) with one MR imager. Both low and high-field imagers, as well as both open and close magnet configurations conform to the requirements of 3D image-based cervical cancer BT. Multiplanar (transversal, sagittal, coronal and oblique image orientation) T2-weighted images obtained with pelvic surface coils are considered as the golden standard for visualisation of the tumour and the critical organs. The use of complementary MRI sequences (e.g. contrast-enhanced T1-weighted or 3D isotropic MRI sequences) is optional. Patient preparation has to be adapted to the needs of BT intervention and MR imaging. (Abs. trunc. at 2000 ch.)
Descriptors     CERVIX NEOPLASMS
BRACHYTHERAPY
MAGNETIC RESONANCE IMAGING
PRACTICE GUIDELINES