Int J Comput Assist Radiol Surg - Morphometry-based measurements of the structural response to whole-brain radiation.

Tópicos

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Resumo

RPOSE: Morphometry techniques were applied to quantify the normal tissue therapy response in patients receiving whole-brain radiation for intracranial malignancies.METHODS: Pre- and Post-irradiation magnetic resonance imaging (MRI) data sets were retrospectively analyzed in N = 15 patients. Volume changes with respect to pre-irradiation were quantitatively measured in the cerebrum and ventricles. Measurements were correlated with the time interval from irradiation. Criteria for inclusion included craniospinal irradiation, pre-irradiation MRI, at least one follow-up MRI, and no disease progression. The brain on each image was segmented to remove the skull and registered to the initial pre-treatment scan. Average volume changes were measured using morphometry analysis of the deformation Jacobian and direct template registration-based segmentation of brain structures.RESULTS: An average cerebral volume atrophy of -0.2 and -3% 3% was measured for the deformation morphometry and direct segmentation methods, respectively. An average ventricle volume dilation of 21 and 20% was measured for the deformation morphometry and direct segmentation methods, respectively.CONCLUSION: The presented study has developed an image processing pipeline for morphometric monitoring of brain tissue volume changes as a response to radiation therapy. Results indicate that quantitative morphometric monitoring is feasible and may provide additional information in assessing response.

Resumo Limpo

rpose morphometri techniqu appli quantifi normal tissu therapi respons patient receiv wholebrain radiat intracrani malignanciesmethod pre postirradi magnet reson imag mri data set retrospect analyz n patient volum chang respect preirradi quantit measur cerebrum ventricl measur correl time interv irradi criteria inclus includ craniospin irradi preirradi mri least one followup mri diseas progress brain imag segment remov skull regist initi pretreat scan averag volum chang measur use morphometri analysi deform jacobian direct templat registrationbas segment brain structuresresult averag cerebr volum atrophi measur deform morphometri direct segment method respect averag ventricl volum dilat measur deform morphometri direct segment method respectivelyconclus present studi develop imag process pipelin morphometr monitor brain tissu volum chang respons radiat therapi result indic quantit morphometr monitor feasibl may provid addit inform assess respons

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