Ravinder Nath, PhD, FACR
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Appointments
Therapeutic Radiology
Primary
Contact Info
Therapeutic Radiology
PO Box 208040
New Haven, CT 06520-8040
United States
About
Titles
Professor Emeritus of Therapeutic Radiology
Appointments
Therapeutic Radiology
EmeritusPrimary
Other Departments & Organizations
- Therapeutic Radiology
- Therapeutic Radiology Treatment Planning
- Yale Cancer Center
- Yale Ventures
Education & Training
- PhD
- Yale University (1971)
- MPhil
- Yale University, Physics (1969)
- Fellow
- Yale School of Medicine
Research
Overview
Current projects include development of new brachytherapy modalities, dosimetry of new brachytherapy sources using TLD and gamma ray spectroscopy, stereotactic radiosurgery, evaluation of the impact of edema on the dosimetry of prostate implants.
Medical Subject Headings (MeSH)
Brachytherapy; Cesium; Physics; Radiation; Radiation Oncology; Radiometry
Research at a Glance
Yale Co-Authors
Frequent collaborators of Ravinder Nath's published research.
Publications Timeline
A big-picture view of Ravinder Nath's research output by year.
Kenneth B. Roberts, MD
Steven Pfau, MD
Zhe Jay Chen, PhD, FAAPM
15Publications
3Citations
Publications
2024
AAPM Task Group Report 267: A joint AAPM GEC‐ESTRO report on biophysical models and tools for the planning and evaluation of brachytherapy
Chen Z, Li X, Brenner D, Hellebust T, Hoskin P, Joiner M, Kirisits C, Nath R, Rivard M, Thomadsen B, Zaider M. AAPM Task Group Report 267: A joint AAPM GEC‐ESTRO report on biophysical models and tools for the planning and evaluation of brachytherapy. Medical Physics 2024, 51: 3850-3923. PMID: 38721942, DOI: 10.1002/mp.17062.Peer-Reviewed Original ResearchConceptsDose delivery patternClinical medical physicistsBrachytherapy modalitiesMedical physicistsAAPM Task Group ReportAmerican Association of PhysicsBrachytherapy treatment planningTask group reportRadioactive sourcesDevelopment of biophysical modelsEuropean Society for Radiotherapy & OncologyGEC-ESTRORadiobiological effectsAAPMRadiation oncologyBrachytherapyBiophysical modelTreatment planningPhysicistsClinical effectsClinical backgroundIrradiated tissueDelivery patternsPractice guidelinesTreatment techniques
2019
Focused kV X-ray Radiotherapy for Ocular Diseases
Liu W, Yan H, MacDonald C, Roberts K, Chen Z, Nath R. Focused kV X-ray Radiotherapy for Ocular Diseases. International Journal Of Radiation Oncology • Biology • Physics 2019, 105: s237-s238. DOI: 10.1016/j.ijrobp.2019.06.345.Peer-Reviewed Original Research
2013
SU‐E‐T‐100: The Influence Edge Electrons in Small Fields: Emphasis by the Difference of Copper‐Cerrobend Cutout
Chu A, Deng J, Feng W, Chen Z, Ahmad M, Nath R. SU‐E‐T‐100: The Influence Edge Electrons in Small Fields: Emphasis by the Difference of Copper‐Cerrobend Cutout. Medical Physics 2013, 40: 226-226. DOI: 10.1118/1.4814535.Peer-Reviewed Original ResearchConceptsCerrobend cutoutsEdge electronsFilm dosimetry techniquesSurface of phantomMonte Carlo calculationsVarian acceleratorPDD curvesElectron scatteringDose profilesDose outputElectron energyEnergy spectrumPrimary electronsDosimetry techniquesElectron beamBeam-qualityPhoton transmissionMonte Carlo simulationsSmall fieldsEdge scatteringChamber measurementsNarrow widthBremsstrahlungCerrobendElectronSU‐E‐T‐118: Small Dynamic Field Dosimetry by Gfachromic Film (EBT3) and 2D‐Array Diode
Chu A, Feng W, Lincoln H, Su F, Nath R. SU‐E‐T‐118: Small Dynamic Field Dosimetry by Gfachromic Film (EBT3) and 2D‐Array Diode. Medical Physics 2013, 40: 230-231. DOI: 10.1118/1.4814553.Peer-Reviewed Original ResearchCitationsConceptsFilm dosimetryField dosimetryChamber measurementsCentral axisAbsolute dose comparisonDynamic MLC fieldsVarian iX linacDiode arraySAD setupMLC fieldsSun NuclearIntrinsic buildupAbsolute doseFilm measurementsDose pointsDose comparisonDose valuesDosimetryDosimetersLow-doseEnergy-dependentSystematic noiseDose accuracyMapCHECKDiode performance
2010
SU‐DD‐A4‐02: Investigation of KV Imaging Doses in the Radiotherapy of Pediatric Cancer Patients
Deng J, Chen Z, Roberts K, Nath R. SU‐DD‐A4‐02: Investigation of KV Imaging Doses in the Radiotherapy of Pediatric Cancer Patients. Medical Physics 2010, 37: 3092-3092. DOI: 10.1118/1.3468000.Peer-Reviewed Original ResearchConceptsOrgan-at-riskDose distributionTesticular shieldingEGS4 Monte Carlo codeDose to critical structuresKV imaging doseReduced beam energyCalculated dose distributionsMonte Carlo codeDose to testesOptimal dose reductionCritical structuresEnhanced photoelectric effectPediatric cancer patientsEclipse TPSField bordersBeam energyPatient CTsDose reductionDVH analysisImaging dosePatient phantomPeak energyKVCBCTLow energy
2009
Testicular Doses in the Era of Image-guided Radiation Therapy and Dose Reduction Techniques
Deng J, Chen Z, Roberts K, Peschel R, Nath R. Testicular Doses in the Era of Image-guided Radiation Therapy and Dose Reduction Techniques. International Journal Of Radiation Oncology • Biology • Physics 2009, 75: s96. DOI: 10.1016/j.ijrobp.2009.07.235.Peer-Reviewed Original Research
2007
TH‐E‐M100E‐07: The Impact of Procedure‐Induced Edema On Cell Survival and Tumor Control Probability in Permanent Prostate Brachytherapy Using 131Cs Radioactive Source
Chen Z, Deng J, Roberts K, Nath R. TH‐E‐M100E‐07: The Impact of Procedure‐Induced Edema On Cell Survival and Tumor Control Probability in Permanent Prostate Brachytherapy Using 131Cs Radioactive Source. Medical Physics 2007, 34: 2655-2655. DOI: 10.1118/1.2761777.Peer-Reviewed Original ResearchCitationsConceptsTumor control probabilityBiologically effective doseControl probabilityPermanent prostate brachytherapyRadioactive sourcesConcept of biologically effective doseProstate brachytherapyProstate edemaEdema magnitudeProtracted dose deliveryPotential doubling timeRepair half-timeCell survivalDose deliveryEffectiveness of cell killingCell killingTumor potential doubling timeSurviving fraction of cancer cellsEdema-induced increaseInitial tumor burdenFraction of cancer cellsRadiation-induced cell killingHalf-lifeDoubling timeTumor burden
2006
2866 Optimal Timing of Conventional Post-Implant Dosimetry for Prostate Seed Implants Utilizing the New Cs-131 Radioactive Seeds and Effective Dose Compensation of Edema-Induced Dose Deficit
Chen Z, Deng J, Roberts K, Nath R. 2866 Optimal Timing of Conventional Post-Implant Dosimetry for Prostate Seed Implants Utilizing the New Cs-131 Radioactive Seeds and Effective Dose Compensation of Edema-Induced Dose Deficit. International Journal Of Radiation Oncology • Biology • Physics 2006, 66: s699-s700. DOI: 10.1016/j.ijrobp.2006.07.1285.Peer-Reviewed Original ResearchSU‐FF‐T‐456: What Is the Optimal Source‐To‐Collimator Distance for An Extendible MLC Designed for Energy‐ and Intensity‐Modulated Electron Radiation Therapy of Superficial Tumors
Deng J, Chen Z, Roberts K, Nath R. SU‐FF‐T‐456: What Is the Optimal Source‐To‐Collimator Distance for An Extendible MLC Designed for Energy‐ and Intensity‐Modulated Electron Radiation Therapy of Superficial Tumors. Medical Physics 2006, 33: 2150-2150. DOI: 10.1118/1.2241374.Peer-Reviewed Original ResearchConceptsSource-to-collimator distancePhase space filesElectron beamMulti-leaf collimatorMeV electron beamElectron radiation therapyLeaf scatteringSuperficial tumorsBeam penumbraMeV beamPhoton contaminationPatient setupLeaf endsPhoton doseDose calculationElectron radiotherapyBeam inputBeamMeVScatteringIn-airOptimal radiotherapyRadiation therapyPenumbraPatient clearance
2005
SU‐FF‐T‐183: Application of a Gantry‐Mounted Diode Array System for QA Dosimetry of High‐Energy Photon Beams
Ahmad M, Chen Z, Song H, Lund M, Deng J, Nath R. SU‐FF‐T‐183: Application of a Gantry‐Mounted Diode Array System for QA Dosimetry of High‐Energy Photon Beams. Medical Physics 2005, 32: 1991-1991. DOI: 10.1118/1.1997864.Peer-Reviewed Original ResearchConceptsGantry angleLeaf speedPhoton beamsBeam profileIMRT fieldsGantry positionDosimetry of high-energy photon beamsHead of the linacHigh-energy photon beamsMLC leaf speedMultiple gantry anglesMV photon beamsDiode array systemDMLC deliveryIMRT beamsLinac gantryClinical beamsY jawsMLC controllerLinear acceleratorBeam characteristicsLinacGantryDynamic deliveryBeam
Academic Achievements and Community Involvement
activity Chairperson
CommitteesYale-New Haven HospitalDetails2006 - 2011DescriptionRadiation Safety Committee and Radioactive Drug Research Committeeactivity Member
CommitteesYale-New Haven HospitalDetails1992 - 2005DescriptionRadiation Safety Committee and Radioactive Drug Research Committeehonor William D. Coolidge Award for Distinguished Contributions to Medical Physics
National AwardAmerican Association of Physicists in MedicineDetails01/01/2001United Statesactivity Chairperson
Professional OrganizationsAmerican Association of Physicists in MedicineDetails1995 - 1995activity President
Professional OrganizationsAmerican Association of Physicists in MedicineDetails1994 - 1994
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Mailing Address
Therapeutic Radiology
PO Box 208040
New Haven, CT 06520-8040
United States