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Titolo:
IMAGING IN 3-DIMENSIONAL CONFORMAL RADIATION-THERAPY
Autore:
MOHAN R; ROTHENBERG L; REINSTIEN L; LING CC;
Indirizzi:
MEM SLOAN KETTERING CANC CTR,1275 YORK AVE NEW YORK NY 10021
Titolo Testata:
International journal of imaging systems and technology
fascicolo: 1, volume: 6, anno: 1995,
pagine: 14 - 32
SICI:
0899-9457(1995)6:1<14:II3CR>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
TREATMENT PLANNING SYSTEM; PORTAL IMAGES; LOCAL-CONTROL; EYE-VIEW; PATIENT; CANCER; VERIFICATION; PROSTATE; SURVIVAL; SECTIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
R. Mohan et al., "IMAGING IN 3-DIMENSIONAL CONFORMAL RADIATION-THERAPY", International journal of imaging systems and technology, 6(1), 1995, pp. 14-32

Abstract

By and large, radiation therapy is a noninvasive method of the treatment of cancer requiring knowledge of the precise location and extent of the disease to be destroyed and the organs to be protected from radiation damage. Images have always played a central role in providing the requisite information for this mode of cancer treatment. Different types of images, such as computed tomography (CT); magnetic resonance imaging (MRI), positron emission tomographic (PET), simulator, etc., are used to varying degrees depending upon their relevance to radiation oncology as well as their accessibility. It is often necessary to merge data from various types of images. The availability of three-dimensional information from tomographic images has allowed the introduction of three-dimensional conformal radiation therapy (3DCRT) methods. Images are employed for diagnosing and establishing the extent of the disease, planning and delivery treatments, and evaluating the effectiveness of the treatment in controlling the disease and assessing the damageto normal tissues. Each image type has a unique informational contentof importance to radiation oncology. To extract the maximum information from images, it is necessary to employ various image processing tools. These tools allow us to perform such functions as (1) image enhancement; (2) image correlation to register information from various images; (3) segmentation of images to extract the surface outlines of the tumor volume and normal anatomic structures; and (4) two- and three dimensional data visualization. One important aspect of planning radiation treatments is the computation of dose distribution in the patient for a proposed configuration of radiation beams. This step requires tracing rays in a three-dimensional CT image data set to compute radiologic path lengths through the patient's body. Although images are employed to a great advantage in radiation oncology, many problems still remain to be solved. Of the various 3DCRT tasks, the outlining of contours of the volume of intended treatment and normal anatomy on images is highly labor-intensive and fraught with uncertainty. In addition, the integration of data from various imaging modalities is difficult and error prone because of distortions inherent in imaging and also becauseof the motion, deformation, and displacement of patients and their internal anatomy. Investigations are in progress to find solutions to these problems. (C) 1995 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 10:59:35