title: Dose optimisation during imaging in radiotherapy.
abstract: The desire to increase the precision in radiotherapy delivery has led to the development of advanced imaging systems such as amorphous silicon (a-Si)-based electronic portal imaging, and kV and MV cone beam CT. These are used prior to the delivery of radiation to visualise the organ to be treated and to ensure that the patient setup and treatment delivery are accurate. However, little attention has been given to the dose received by adjacent normal tissues during these imaging procedures. Though these doses are very small compared to the dose delivered during radiotherapy, the involvement of normal tissues and the concern that these could increase the probability of stochastic effect, mainly the induction of secondary malignancy, cannot be ignored. This article reviews some work on the doses received during imaging in radiotherapy and the methods to optimise the same.
authors: Christian Medical College, Vellore, India.
authors: P
authors: P
authors: Ravindran
references: Phys Med Biol. 1998 Jan;43(1):155-69
references: 9483629
references: Radiother Oncol. 2005 Oct;77(1):45-52
references: 16157400
references: Int J Radiat Oncol Biol Phys. 1980 Jul;6(7):935-9
references: 6782046
references: Med Phys. 2004 Apr;31(4):828-31
references: 15125000
references: Med Phys. 1993 Jan-Feb;20(1):199-204
references: 8455500
references: Med Phys. 2001 May;28(5):712-37
references: 11393467
references: Int J Radiat Oncol Biol Phys. 2002 Aug 1;53(5):1337-49
references: 12128137
references: Med Phys. 2001 Feb;28(2):220-31
references: 11243347
references: Med Phys. 2006 Jun;33(6):1573-82
references: 16872065
references: Int J Radiat Oncol Biol Phys. 2004 Jul 15;59(4):1229-35
references: 15234060
references: Radiother Oncol. 1998 Sep;48(3):319-28
references: 9925252
references: J Appl Clin Med Phys. 2002 Spring;3(2):88-96
references: 11958649
references: Med Phys. 2002 Dec;29(12):2913-24
references: 12512728
references: Med Phys. 2002 Jun;29(6):967-75
references: 12094992
references: Int J Radiat Oncol Biol Phys. 2005 Feb 1;61(2):552-60
references: 15736320
references: Int J Radiat Oncol Biol Phys. 1995 Dec 1;33(5):1273-80
references: 7493852
references: Br J Radiol. 2001 Sep;74(885):789-804
references: 11560826
references: Int J Radiat Oncol Biol Phys. 2003 Mar 1;55(3):793-803
references: 12573767
references: Br J Radiol. 2004 Jul;77(919):557-61
references: 15238401