A New Approach to Reduce Number of Split Fields in Large Field IMRT

Chen Chiao Lee, Andrew Wu, Madhur K. Garg, Subhakar Mutyala, Shalom Kalnicki, Gary Sayed, Dennis Mah

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Intensity-modulated radiation therapy (IMRT) has been applied for treatments of primary head with neck nodes, lung with supraclavicular nodes, and high-risk prostate cancer with pelvis wall nodes, all of which require large fields. However, the design of the Varian multileaf collimator requires fields >14 cm in width to be split into 2 or more carriage movements. With the split-field technique, both the number of monitor units (MUs) and total treatment time are significantly increased. Although many different approaches have been investigated to reduce the MU, including introducing new leaf segmentation algorithms, none have resulted in widespread success. In addition, for most clinics, writing such algorithms is not a feasible solution, particularly with commercial treatment planning systems. We introduce a new approach that can minimize the number of split fields and reduce the total MUs, thereby reducing treatment time. The technique is demonstrated on the Eclipse planning system V7.3, but could be generalized to any other system.

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalMedical Dosimetry
Volume36
Issue number1
DOIs
StatePublished - 2011

Fingerprint

Radiotherapy
Pelvic Neoplasms
Therapeutics
Prostatic Neoplasms
Neck
Head
Lung

Keywords

  • Large PTV
  • Large-field IMRT
  • Split fields

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

A New Approach to Reduce Number of Split Fields in Large Field IMRT. / Lee, Chen Chiao; Wu, Andrew; Garg, Madhur K.; Mutyala, Subhakar; Kalnicki, Shalom; Sayed, Gary; Mah, Dennis.

In: Medical Dosimetry, Vol. 36, No. 1, 2011, p. 1-5.

Research output: Contribution to journalArticle

Lee, Chen Chiao ; Wu, Andrew ; Garg, Madhur K. ; Mutyala, Subhakar ; Kalnicki, Shalom ; Sayed, Gary ; Mah, Dennis. / A New Approach to Reduce Number of Split Fields in Large Field IMRT. In: Medical Dosimetry. 2011 ; Vol. 36, No. 1. pp. 1-5.
@article{5b091ccb64ec410fb52bbe4ba53d04bf,
title = "A New Approach to Reduce Number of Split Fields in Large Field IMRT",
abstract = "Intensity-modulated radiation therapy (IMRT) has been applied for treatments of primary head with neck nodes, lung with supraclavicular nodes, and high-risk prostate cancer with pelvis wall nodes, all of which require large fields. However, the design of the Varian multileaf collimator requires fields >14 cm in width to be split into 2 or more carriage movements. With the split-field technique, both the number of monitor units (MUs) and total treatment time are significantly increased. Although many different approaches have been investigated to reduce the MU, including introducing new leaf segmentation algorithms, none have resulted in widespread success. In addition, for most clinics, writing such algorithms is not a feasible solution, particularly with commercial treatment planning systems. We introduce a new approach that can minimize the number of split fields and reduce the total MUs, thereby reducing treatment time. The technique is demonstrated on the Eclipse planning system V7.3, but could be generalized to any other system.",
keywords = "Large PTV, Large-field IMRT, Split fields",
author = "Lee, {Chen Chiao} and Andrew Wu and Garg, {Madhur K.} and Subhakar Mutyala and Shalom Kalnicki and Gary Sayed and Dennis Mah",
year = "2011",
doi = "10.1016/j.meddos.2009.10.001",
language = "English (US)",
volume = "36",
pages = "1--5",
journal = "Medical Dosimetry",
issn = "0958-3947",
publisher = "Elsevier Inc.",
number = "1",

}

TY - JOUR

T1 - A New Approach to Reduce Number of Split Fields in Large Field IMRT

AU - Lee, Chen Chiao

AU - Wu, Andrew

AU - Garg, Madhur K.

AU - Mutyala, Subhakar

AU - Kalnicki, Shalom

AU - Sayed, Gary

AU - Mah, Dennis

PY - 2011

Y1 - 2011

N2 - Intensity-modulated radiation therapy (IMRT) has been applied for treatments of primary head with neck nodes, lung with supraclavicular nodes, and high-risk prostate cancer with pelvis wall nodes, all of which require large fields. However, the design of the Varian multileaf collimator requires fields >14 cm in width to be split into 2 or more carriage movements. With the split-field technique, both the number of monitor units (MUs) and total treatment time are significantly increased. Although many different approaches have been investigated to reduce the MU, including introducing new leaf segmentation algorithms, none have resulted in widespread success. In addition, for most clinics, writing such algorithms is not a feasible solution, particularly with commercial treatment planning systems. We introduce a new approach that can minimize the number of split fields and reduce the total MUs, thereby reducing treatment time. The technique is demonstrated on the Eclipse planning system V7.3, but could be generalized to any other system.

AB - Intensity-modulated radiation therapy (IMRT) has been applied for treatments of primary head with neck nodes, lung with supraclavicular nodes, and high-risk prostate cancer with pelvis wall nodes, all of which require large fields. However, the design of the Varian multileaf collimator requires fields >14 cm in width to be split into 2 or more carriage movements. With the split-field technique, both the number of monitor units (MUs) and total treatment time are significantly increased. Although many different approaches have been investigated to reduce the MU, including introducing new leaf segmentation algorithms, none have resulted in widespread success. In addition, for most clinics, writing such algorithms is not a feasible solution, particularly with commercial treatment planning systems. We introduce a new approach that can minimize the number of split fields and reduce the total MUs, thereby reducing treatment time. The technique is demonstrated on the Eclipse planning system V7.3, but could be generalized to any other system.

KW - Large PTV

KW - Large-field IMRT

KW - Split fields

UR - http://www.scopus.com/inward/record.url?scp=79551588313&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79551588313&partnerID=8YFLogxK

U2 - 10.1016/j.meddos.2009.10.001

DO - 10.1016/j.meddos.2009.10.001

M3 - Article

VL - 36

SP - 1

EP - 5

JO - Medical Dosimetry

JF - Medical Dosimetry

SN - 0958-3947

IS - 1

ER -