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Dosimetric comparison of integral dose for different techniques of craniospinal irradiation

Published online by Cambridge University Press:  09 June 2020

Brijesh Goswami Open the ORCID record for Brijesh Goswami [Opens in a new window] ,
Rakesh Kumar Jain ,
Suresh Yadav Open the ORCID record for Suresh Yadav [Opens in a new window] ,
Sunil Kumar ,
Saji Oommen ,
Sapna Manocha  and
Genesh K. Jadav
Brijesh Goswami*
Affiliation:
Department of Radiotherapy, Indraprastha Apollo Hospital, New Delhi, India Department of Physics, Shobhit Institute of Engineering & Technology, Meerut, Uttar Pradesh, India
Rakesh Kumar Jain
Affiliation:
Department of Physics, Shobhit Institute of Engineering & Technology, Meerut, Uttar Pradesh, India
Suresh Yadav
Affiliation:
Department of Radiotherapy, Gandhi Medical College, Bhopal, Madhya Pradesh, India
Sunil Kumar
Affiliation:
Department of Radiotherapy, Indraprastha Apollo Hospital, New Delhi, India
Saji Oommen
Affiliation:
Department of Radiotherapy, Indraprastha Apollo Hospital, New Delhi, India
Sapna Manocha
Affiliation:
Department of Radiotherapy, Indraprastha Apollo Hospital, New Delhi, India
Genesh K. Jadav
Affiliation:
Department of Radiotherapy, Indraprastha Apollo Hospital, New Delhi, India
*
Author for correspondence: Brijesh Goswami, Department of Radiotherapy, Indraprastha Apollo Hospital, New Delhi110076, India and Department of Physics, Shobhit Institute of Engineering & Technology, Modipuram, Meerut, Uttar Pradesh250110, India. E-mail: [email protected], [email protected]
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Abstract

Aim:

Comparison of the integral dose (ID) delivered to organs at risk (OAR), non-target body and target body by using different techniques of craniospinal irradiation (CSI).

Materials and methods:

Ten CSI patients (medulloblastoma) already planned and treated either with linear accelerator three-dimensional conformal radiation therapy (Linac-3DCRT) technique or with linear accelerator RapidArc (Linac-RapidArc) technique by Novalis-Tx Linac machine have been analysed. Retrospectively, these patients are again planned on Radixact-X9 Linac with Helical, Direct-3DCRT and Direct-intensity-modulated radiation therapy (Direct-IMRT) techniques. The dose prescription to planning target volume brain (PTV-Brain) and PTV-Spine is 36 Gy in 20 fractions and is kept the same for all techniques. The target body, non-target body, OARs and total body dose are compared.

Results:

ID is lowest in the RapidArc plan for every patient in comparison to Helical and Direct-IMRT. The ID for Body-PTV was found slightly higher in the RapidArc plan in comparison to 3DCRT plans. But there is better normal tissue sparing for most of the OARs in RapidArc plans if it compares with 3DCRT plans.

Findings:

RapidArc is a better alternative for the treatment of CSI. It provides better target coverage and better OARs sparing from any other treatment techniques.

Keywords

craniospinal irradiationhelicalintegral doseintensity-modulated radiotherapyRapidArcthree-dimensional conformal radiation therapy
Type
Original Article
Information
Journal of Radiotherapy in Practice , Volume 20 , Issue 3 , September 2021 , pp. 345 - 350
Copyright
© The Author(s), 2020. Published by Cambridge University Press

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