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 ResearchDose 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 ResearchCerrobend 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 ResearchFilm 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 ResearchOrgan-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 ResearchTumor 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 ResearchSource-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 ResearchGantry 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 deliveryBeamTU‐FF‐A2‐03: Effects of CT Calibration On Tissue Inhomogeneity Correction in Radiotherapy
Song H, Chen Z, Ahmad M, Deng J, Fan Y, Nath R. TU‐FF‐A2‐03: Effects of CT Calibration On Tissue Inhomogeneity Correction in Radiotherapy. Medical Physics 2005, 32: 2115-2115. DOI: 10.1118/1.1998474.Peer-Reviewed Original ResearchTissue inhomogeneity correctionsCT calibration curveInhomogeneity correctionCT calibrationDose calculationElectron density relative to waterDetermination of electron densityCT number errorDose calculation errorsGE Light SpeedMV beamRadiation beamLight speedField sizeElectron densityLow-kVNumber errorHigh-kVPhysical thicknessBeamCortical boneCalculationsKVCorrectionDensity of waterSU‐FF‐T‐91: Unusually Large Fluctuation of Monitor Unit (MU) Efficiency in Large‐Field IMRT Plans Using Sliding‐Window Technique
Song H, Chen Z, Fan Y, Deng J, Ahmad M, Nath R. SU‐FF‐T‐91: Unusually Large Fluctuation of Monitor Unit (MU) Efficiency in Large‐Field IMRT Plans Using Sliding‐Window Technique. Medical Physics 2005, 32: 1970-1970. DOI: 10.1118/1.1997762.Peer-Reviewed Original ResearchStep-and-shootStep-and-shoot techniqueMU efficiencyWhole-body doseMonitor unitsIMRT plansEclipse treatment planning systemMV photon beamsTreatment planning systemTreatment monitor unitsSliding-window techniqueProstate plansIMRT deliveryMultileaf collimatorPhoton beamsLinear acceleratorPrescription doseIMRTPlanning systemDoseMultileafFluctuationsX-rayNeutronCollimator
2003
Dose Threshold for Clinical Success in Coronary Brachytherapy: A Nested Case-Control Study
Singh H, Yue N, Roberts K, Nath R, Pfau S. Dose Threshold for Clinical Success in Coronary Brachytherapy: A Nested Case-Control Study. Journal Of Investigative Medicine 2003, 51: 338-339. DOI: 10.1177/108155890305100626.Peer-Reviewed Original ResearchDOSE THRESHOLD FOR CLINICAL SUCCESS IN CORONARY BRACHYTHERAPY: A NESTED CASE-CONTROL STUDY.
Singh H, Yue N, Roberts K, Nath R, Pfau S. DOSE THRESHOLD FOR CLINICAL SUCCESS IN CORONARY BRACHYTHERAPY: A NESTED CASE-CONTROL STUDY. Journal Of Investigative Medicine 2003, 51: 338. DOI: 10.1097/00042871-200311000-00026.Peer-Reviewed Original Research
1999
2261 Edema induced increase in tumor cell survival for 125I and 103PD prostate seed implants
Yue N, Chen Z, Roberts K, Nath R. 2261 Edema induced increase in tumor cell survival for 125I and 103PD prostate seed implants. International Journal Of Radiation Oncology • Biology • Physics 1999, 45: 412-413. DOI: 10.1016/s0360-3016(99)90529-1.Peer-Reviewed Original Research