Adaptive threshold segmentation of pituitary adenomas from FDG PET images for radiosurgery
نویسندگان
چکیده
منابع مشابه
Adaptive threshold segmentation of pituitary adenomas from FDG PET images for radiosurgery
In this study we have attempted to optimize a PET based adaptive threshold seg- mentation method for delineating small tumors, particularly in a background of high tracer activity. The metabolic nature of pituitary adenomas and the constraints of MRI imaging in the postoperative setting to delineate these tumors during radio- surgical procedures motivated us to develop this method. Phantom expe...
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Stereotactic Radiosurgery (SRS) is a technology that utilizes externally generated ionizing radiation to treat (a) defined target(s) in the head or spine without the need to make an incision. The target is defined by high-resolution stereotactic imaging. It uses multiple convergent beams aimed to the target. The beams deliver a maximal dose to the target (with precision of less than 1mm), while...
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Liver segmentation is an important prerequisite for planning of surgical interventions like liver tumor resections. In this paper we propose a method for automated liver segmentation from images that is invariant in provisions of size, shape and intensity values. The system consists of three stages. In the first stage of the computerized system, Preprocessing of an image is done to reduce the n...
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OBJECT To assess the effects of radiosurgery (RS) on the radiological and hormonal control and its toxicity in the treatment of pituitary adenomas. METHODS Retrospective analysis of 42 patients out of the first 48 consecutive patients with pituitary adenomas treated with RS between 1999 and 2008 with a 6 months minimum follow-up. RS was delivered with Gamma Knife as a primary or adjuvant trea...
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Recently introduced combined PET/MR scanners need to handle the specific problem that a limited MR field of view sometimes truncates arm or body contours, which prevents an accurate calculation of PET attenuation correction maps. Such maps of attenuation coefficients over body structures are required for a quantitatively correct PET image reconstruction. This paper addresses this problem by pre...
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ژورنال
عنوان ژورنال: Journal of Applied Clinical Medical Physics
سال: 2014
ISSN: 1526-9914
DOI: 10.1120/jacmp.v15i6.4952