Method for reducing scatter radiation dose to the contralateral breast during tangential breast irradiation therapy.

Muller-Runkel, R.; Kalokhe, U.

doi:10.1148/radiology.191.3.8184078

Cited by 15 publications

(9 citation statements)

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“…The relative dose decreases initially with depth, reaching a minimum at the depth of central ray peak dose d max . These characteristics are in agreement with results found by others [2, 42]. Studies showed that the out-of-field dose is qualitatively similar in behavior and of the same order of magnitude for all the treatment machines studied [2, 43-45].…”

Section: Discussionsupporting

confidence: 92%

Use of new radiochromic devices for peripheral dose measurement: potential in-vivo dosimetry application

Chiu‐Tsao¹,

Chan²

2009

Biomed. Imaging Interv. J.

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The authors have studied the feasibility of using three new high-sensitivity radiochromic devices in measuring the doses to peripheral points outside the primary megavoltage photon beams. The three devices were GAFCHROMIC® EBT film, prototype Low Dose (LD) Film, and prototype LD Card. The authors performed point dosimetry using these three devices in water-equivalent solid phantoms at x = 3,5,8,10, and 15 cm from the edge of 6 MV and 15 MV photon beams of 10x10 cm2, and at depths of 0, 0.5 cm, and depth of maximum dose. A full sheet of EBT film was exposed with 5000 MU. The prototype LD film pieces were 1.5x2 cm2 in size. Some LD films were provided in the form of a card in 1.8x5 cm2 holding an active film in 1.8x2 cm2. These are referred to as “LD dosimeter cards”. The small LD films and cards were exposed with 500 MU. For each scanned film, a 6 mm circular area centered at the measurement point was sampled and the mean pixel value was obtained. The calibration curves were established from the calibration data for each combination of film/cards and densitometer/scanner. The doses at the peripheral points determined from the films were compared with those obtained using ion chamber at respective locations in a water phantom and general agreements were found. It is feasible to accurately measure peripheral doses of megavoltage photon beams using the new high-sensitivity radiochromic devices. This near real-time and inexpensive method can be applied in a clinical setting for dose measurements to critical organs and sensitive patient implant devices.

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Section: Discussionsupporting

confidence: 92%

Use of new radiochromic devices for peripheral dose measurement: potential in-vivo dosimetry application

Chiu‐Tsao¹,

Chan²

2009

Biomed. Imaging Interv. J.

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“…These characteristics agree with results found by others. 5,20,31 Studies have shown that the out-of-field dose is qualitatively similar in behavior and of the same order of magnitude for all the treat- ment machines studied. 5,[32][33][34] The scatter radiation outside the field edge consists mainly of low-energy photons and electron contamination.…”

Section: Resultsmentioning

confidence: 81%

Estimating dose to implantable cardioverter-defibrillator outside the treatment fields using a skin QED diode, optically stimulated luminescent dosimeters, and LiF thermoluminescent dosimeters

et al. 2012

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“…14 Several groups have suggested that a far less thick lead shield might have significant protective effect. 15,16 In a series of phantom measurements, we found that the majority of contralateral dose is blocked by a few millimeters of lead. In a series of patients age 50 and less, we have tested lead shields for both tolerability and efficacy using both half-beam blocked and posteriorly aligned tangential fields.…”

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confidence: 89%

Shielding of the Contralateral Breast During Tangential Irradiation

Goffman¹,

Miller²,

Laronga³

et al. 2004

American Journal of Clinical Oncology

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The purpose of this study was to investigate both optimal and practical contralateral breast shielding during tangential irradiation in young patients. A shaped sheet of variable thickness of lead was tested on a phantom with rubber breasts, and an optimized shield was created. Testing on 18 consecutive patients 50 years or younger showed shielding consistently reduced contralateral breast dose to at least half, with small additional reduction after removal of the medial wedge. For younger patients in whom radiation exposure is of considerable concern, a simple shield of 2 mm lead thickness proved practical and effective.

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Method for reducing scatter radiation dose to the contralateral breast during tangential breast irradiation therapy.

Abstract: Reduction in unwanted scatter dose to the contralateral breast is in accord with the philosophy of keeping radiation exposure as low as reasonably achievable and might be of most benefit for young patients.

Cited by 15 publications

References 0 publications

Use of new radiochromic devices for peripheral dose measurement: potential in-vivo dosimetry application

Use of new radiochromic devices for peripheral dose measurement: potential in-vivo dosimetry application

Estimating dose to implantable cardioverter-defibrillator outside the treatment fields using a skin QED diode, optically stimulated luminescent dosimeters, and LiF thermoluminescent dosimeters

Shielding of the Contralateral Breast During Tangential Irradiation

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