By Paul Keall, Tokihiro Yamamoto, Yelin Suh (auth.), Jan Ehrhardt, Cristian Lorenz (eds.)
Respiratory movement explanations a big uncertainty in radiotherapy making plans of the thorax and top stomach. the most target of radiation treatment is to eliminate or cut down tumor cells with out harmful the encircling tissue via offering a excessive radiation dose to the tumor area and a dose as little as attainable to fit organ tissues. assembly this call for is still a problem specially in case of lung tumors because of breathing-induced tumor and organ movement the place movement amplitudes can degree as much as a number of centimeters. accordingly, modeling of breathing movement has turn into more and more very important in radiation treatment. With 4D imaging concepts spatiotemporal photograph sequences will be obtained to enquire dynamic methods within the patient’s physique. in addition, picture registration allows the estimation of the breathing-induced movement and the outline of the temporal switch in place and form of the constructions of curiosity by way of constructing the correspondence among photographs got at diverse stages of the respiring cycle. In radiation treatment those movement estimations are used to outline actual remedy margins, e.g. to calculate dose distributions and to increase prediction versions for gated or robot radiotherapy. during this ebook, the expanding position of photo registration and movement estimation algorithms for the translation of advanced 4D scientific picture sequences is illustrated. various 4D CT photograph acquisition recommendations and conceptually various movement estimation algorithms are offered. The scientific relevance is tested by way of instance functions that are with regards to the radiation remedy of thoracic and stomach tumors. The cutting-edge and views are proven by way of an perception into the present box of study. The booklet is addressed to biomedical engineers, clinical physicists, researchers and physicians operating within the fields of scientific photo research, radiology and radiation therapy.
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Extra resources for 4D Modeling and Estimation of Respiratory Motion for Radiation Therapy
Potential radiotherapy improvements with respiratory gating. Australas. Phys. Eng. Sci. Med. 25(1), 1–6 (2002) 37. , Wong, 1 Introduction to 4D Motion Modeling and 4D Radiotherapy 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. : The management of respiratory motion in radiation oncology report of AAPM task group 76. Med. Phys. : Acquiring 4D thoracic CT scans using a multislice helical method. Phys. Med. Biol. : Respiratory regularity gated 4D CT acquisition: concepts and proof of principle.
To acquire the cine 4D CT data with GE scanners, the numbers of SRO data channels 30 T. Pan Fig. 3 (a) GE detector layout for 4, 8, 16 and 64 data channels. The shaded regions illustrate the data channels that can be simultaneously read-out. (b) Data acquisition layout of GE 4D CT for various numbers of data channels. 625 mm. 5 mm) detector coverage. (c) Siemens/Philips detector layout of 16, 20, 40, and 64 data channels. Siemens 40 and 64-channel scanners (marked with asterisk *) based on the 20 and 32-channel detectors, respectively, utilize the technology of z-flying focal spot to fast switch between two focal spots at each projection angle to achieve the effect of 40 and 64 data channels, respectively.
Oncol. 14(1), 81–90 (2004) 36. : Potential radiotherapy improvements with respiratory gating. Australas. Phys. Eng. Sci. Med. 25(1), 1–6 (2002) 37. , Wong, 1 Introduction to 4D Motion Modeling and 4D Radiotherapy 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. : The management of respiratory motion in radiation oncology report of AAPM task group 76. Med. Phys. : Acquiring 4D thoracic CT scans using a multislice helical method. Phys. Med. Biol. : Respiratory regularity gated 4D CT acquisition: concepts and proof of principle.