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OncologyMedicalPhysics.com provides educational resources for the radiation therapy and medical physics community. Whether you're studying for board exams or looking to brush up on your medical physics knowledge, we've got you covered.

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Recent Updates

UpdateDate
Correction (problem ID 13141)
User credit: B.V.
4/29/2021
Published page: Counting Statistics4/28/2021
Published page: Quantifying Accuracy, Precision, and Error4/25/2021
Correction: NRC 10 CFR - Skin occupational dose limit.
User credit: Y.K.
4/20/2021
Correction: Statistical Radiobiology figures 1 and 2.
User credit: M.A.
4/19/2021
Correction (problem ID 1857)
Correction (problem ID 15738)
Correction (problem ID 20005)
User credit: K.A.
4/13/2021
Correction (problem ID 22323)
Correction (problem ID 24115)
User credit: K.A.
4/12/2021
Correction (problem ID 5602)
User credit: K.A.
4/8/2021
Correction (problem ID 24429)
User credit: A.S.
4/7/2021
Correction: Two-source-rule
User credit: R.R.
3/28/2021
Published page: Respiratory Motion Management2/22/2021
Correction: Treatment Planning System - Pencil Beam
User credit: I.M.
2/11/2021
Added 35 questions: Part 2 - Treatment Machines
Added 15 questions: Medical Physics for Radiation Oncology - Particle Therapy
Added 6 questions: Part 2 - Dosimetry
Added 11 questions: Part 2 - Safety and Regulations
2/2/2021
Added 24 questions: ABR 2 - Treatment Planning
Added 13 questions: Medical Physics for Radiation Oncology - SRS and SBRT
Added 3 questions: Medical Physics for Radiation Oncology - Special Procedures
Added 35 questions: ABR 1 - Radiation Physics
Added 18 questions: ABR 2 - Imaging
Added 8 questions: ABR 1 - Radiation Measurement
Added 13 questions: ABR 1 - Radiation Safety
1/28/2021
Correction (problem ID 3576)
User credit: D. A.
Added 18 questions: ABR 1 - Therapy
Added 13 questions: ABR 1 - Nuclear
Added 30 questions: ABR 1 - Diagnostic
Added 11 questions: ABR 1 - Math and Statistics
1/26/2021
Added 25 questions: Hand Calculations
Added 10 questions: Simulation
Added 9 questions: Basic radiation shielding
Added 20 questions: Basic treatment planning
Added 10 questions: Calibration of photon and electron beams
Added 12 questions: ABR Part 1 - Clinical linear accelerator principles
Added 51 questions: ABR Part 2 - Linac Design and Quality Assurance
Added 2 questions: Brachytherapy
1/13/2021
Added 5 questions: ABR 1 - Ultrasound
Added 22 questions: ABR 2 - Treatment planning quality assurance
Added 4 questions: Medical Physics for Radiation Oncology - IMRT treatment planning
Added 7 questions: Medical Physics for Radiation Oncology - Prescribing, reporting and evaluation
Added 6 questions: Medical Physics for Radiation Oncology - Quality Assurance

Correction (problem ID 18043)
Correction (problem ID 18022)
Correction (problem ID 18037)
Correction (problem ID 1465)
User credit: A.Y.
1/12/2021
Updated electron PDD table.
User credit: E.R.
1/11/2021
Correction (problem ID 14143)
User credit: A. Y.

Added compensator filter thickness equation.
User credit: E. R.
1/10/2021
Added 14 questions: Basic Atomic and Nuclear Physics1/8/2021
Added 30 questions: Part 2 - Advanced Treatment Planning
Added 26 questions: Medical Physics for Radiation Oncology - IMRT Treatment Planning
Added 2 questions: Medical Physics for Radiation Oncology - Treatment Plan Evaluation
1/6/2021
Added 24 questions: Advanced Brachytherapy1/4/2021
Correction (problem ID 16662)
User credit: A. Y.
1/4/2021
Correction (problem ID 8107)
Correction (problem ID 14413)
Correction (problem ID 3696)
Correction (problem ID 8098)
User credit: A. Y.
1/3/2021
Corrections (multiple spelling and formatting errors) - Computed Tomography
Correction (problem ID 16291)
Correction (problem ID 3459)
Correction (problem ID 3480)
User credit: I.M.
12/30/2020
Updated time and question allocation for all Simulated Exams.
Find out more about the ABR exam breakdown and timing here. (External link)
12/17/20
Correction (problem ID 1131)12/16/2020
Correction (problem ID 1378)12/11/2020
Correction (problem ID 7541)
User credit: James
12/1/2020
Minor update: Photon therapy - Dose horns
Correction (problem ID 3630)
User credit: James
11/28/2020
Server migration11/23/2020
New Page: Affiliate Book Store
11/10/2020
Correction (problem ID 3578)
User credit: Justin
Correction (problem ID 1681)
User credit: James
11/5/2020
Major update: TG-51 electron procedure.
Minor update: Basic Radiation Physics
10/28/2020
Major update: TG-51 photon procedure.10/22/2020
Correction: Spelling, grammar or wording - Magnetic Resonance Imaging
User credit: James
10/15/2020
Image loading speed optimizations.10/14/2020
Correction: Incorrect information (problem ID: 17869)
Correction: Spelling, grammar or wording. (problem ID: 17847)
Bug reporting: Magnetic Resonance Imaging
User credit: James
10/14/2020
Correction: Spelling, grammar, or wording. (problem ID 3992)
User credit: James
10/12/2020
Correction: Linear attenuation equation.
User credit: James
10/8/2020
Software update. Optimizations in progress.10/6/2020
Correction: Spelling, grammar, or wording. (problem ID 5862)
Correction: Spelling, grammar, or wording. (problem ID 8365)
User credit: James
9/30/2020
Site optimizations for mobile. Practice test pages.9/21/2020
Completed update of section icons.9/18/2020
Premium Membership price reduction.9/16/2020
Updated icons: ABR Part 2 Practice Tests
Updated icons: Medical Physics for Radiation Oncology Exam
9/5/2020
Added section icons: Radiobiology8/25/2020
Added section icons: Radioactive Decay8/21/2020
Added section icons: Basic Radiation Physics8/19/2020
Added icons for medical physics test sections: ABR Part 1 Practice Tests8/18/2020
Added illustration of Compton scattering angle: Basic Radiation Physics
Added icons for physics test sections: ABR Part 1 Practice Tests
8/17/2020
Added illustrations of ultrasound image quality phantom, shadowing artifact, enhancement artifact, reverberation artifact, speed artifact, and twinkling artifact: Ultrasound8/8/2020
Added illustrations of ultrasound transducer and ultrasound beam: Ultrasound8/1/2020
Added illustrations of ultrasound modes and system components: Ultrasound7/27/2020
Correction: Triplet production energy equation - Basic Radiation Physics
User credit: JAEHYEON LEE
7/27/2020
Added illustrations of reflection & refraction, acoustic waves, Doppler Ultrasound, and mirror artifact: Ultrasound7/27/2020
Added topic icons, soundwave gif, and interference patter illustrations: Ultrasound7/25/2020
Added page: Ultrasound7/23/2020
Added page: Nuclear Medical Physics7/22/2020
Correction: Spelling, grammar, or wording.6/29/2020
Correction (problem ID 2014)6/29/2020
Correction: Spelling, grammar, or wording.6/29/2020
Correction: Spelling, grammar, or wording.6/28/2020
Updated points values OMP Bounty Hunt6/28/2020
Added Medical Physics for Radiation Oncology Quiz
(917 questions)
6/13/2020
Added 13 questions: Part 1
Added 3 questions: Part 2
5/21/2020
Added 10 questions: Part 25/19/2020
Added 18 questions: Part 15/18/2020
Correction (problem ID 1091)
Correction (problem ID 1082)
Correction (problem ID 8139)
User credit: James
5/18/2020
Correction (problem ID 1461)
Correction (problem ID 1466)
Correction (problem ID 1467)
User credit: Jiahan Zhang
5/18/2020
Added 25 questions: Part 25/17/2020
Added 24 questions: Part 1
Added 32 questions: Part 2
5/14/2020
Minor update: Radiosurgery User credit: K.B.5/13/2020
New Page: Radiosurgery5/4/2020
Major Update: Treatment Planning Systems5/4/2020
Added countdown to test day. User credit: James4/30/2020
Improved solution (problem ID 8304) User credit: James4/30/2020
Improved solution (problem ID 8277) User credit: James4/30/2020
Wording correction (problem ID 8466) User credit: James4/30/2020
Added 26 questions: Ultrasound4/29/2020
Minor Update: Basic Radiation Physics4/23/2020
Major Update: Treatment Planning Systems - Algorithms, Commissioning and QA4/22/2020
Major Update: Brachytherapy Clinical Applications4/21/2020
Major Update: Special Procedures - TBI and TSET4/21/2020
Update and corrections: Radioactive Equilibrium
User credit: James
4/21/2020
Major Update: Linear Accelerator Dosimetry and Quality Assurance4/20/20
OMP Bounty Hunt Awards Rewards
Program Launch
4/20/20
Major Update: Brachytherapy Dosimetry and Quality Assurance4/17/2020
Spelling correction (Electron Therapy Physics)
User credit: James
4/16/2020
Wording correction (problem ID 3756)
User credit: James
4/15/2020
Wording correction (problem ID 3744)
User credit: James
4/15/2020
Image annotation (Electron PDD)
User credit: James
4/14/2020
Wording correction (problem ID 5870)
User credit: James
4/14/2020
Wording correction (problem ID 5962)
User credit: James
4/13/2020
Formatting Correction (problem ID 8312)
User credit: James
4/12/2020
Proofing edits: All Practice tests, Radiation Physics, Medical Imaging, and Equipment pages4/9/2020
Formatting Correction (problem ID 5741)
User credit: James
4/7/2020
Formatting Correction (problem ID 8568)
User credit: James
4/7/2020
Category correction (problem ID 5959)
User credit: James
4/6/2020
Formatting Correction (problem ID 5935)
User credit: James
4/6/2020
Part 3 Mock Oral Exams Cancelled4/2/2020
Minor update: Photon Therapy Physics - SSD Dependence
User credit: V.F.
3/28/2020
Reorganization of content sections3/26/2020
Update: Clinical Linear Accelerators3/26/2020
Added 50 questions: 1378 total questions3/23/2020
Added 25 questions: 1328 total questions3/2/2020
Update: Magnetic Resonance Imaging3/1/2020
Major Update: Part 2 Practice Tests
(Introduced Full length practice tests, reorganization of Test Your Way)
2/28/2020
Added 10 questions: 1303 total questions2/27/2020
Added 5 questions: 1293 total questions2/26/2020
Major Update: Part 1 Practice Tests
(Introduced Full length practice tests, reorganization of Test Your Way)
2/25/2020
Added 5 questions: 1288 total questions2/25/2020
Added 5 questions: 1283 total questions2/24/2020
Added 5 questions: 1278 total questions2/21/2020
Added 5 questions: 1273 total questions2/20/2020
Minor update: Computed Tomography2/19/2020
Added 5 questions: 1268 total questions2/19/2020
Added 5 questions: 1263 total questions2/18/2020
OncologyMedicalPhysics.com is now taking sign ups for ABR Part 3 Therapy mock oral exams!2/17/2020
Added 5 questions: 1258 total questions2/17/2020
Added 5 questions: 1253 total questions2/14/2020
Added 5 questions: 1248 total questions2/13/2020
Added 5 questions: 1243 total questions2/12/2020
Added 5 questions: 1238 total questions2/11/2020
Added 5 questions: 1233 total questions2/10/2020
Added 5 questions: 1228 total questions2/7/2020
Added 5 questions: 1223 total questions2/6/2020
Added 5 questions: 1218 total questions2/5/2020
Added 5 questions: 1213 total questions2/4/2020
Added 5 questions: 1208 total questions2/3/2020
Added 5 questions: 1203 total questions1/31/2020
Added 5 questions: 1198 total questions1/30/2020
Page update: Image Quality Metrics1/29/2020
Added 5 questions: 1193 total questions1/29/2020
Added 5 questions: 1188 total questions1/28/2020
Page update: Kilovoltage X-ray Generation1/27/2020
Page update: Computed Tomography1/27/2020
Added 5 questions: 1183 total questions1/27/2020
Added 5 questions: 1178 total questions1/24/2020
Added 5 questions: 1173 total questions1/23/2020
Page update: Radiation Detectors1/22/2020
Added 5 questions: 1168 total questions1/22/2020
Added 5 questions: 1163 total questions1/21/2020
Added 5 questions: 1158 total questions1/20/2020
Added 5 questions: 1153 total questions1/17/2020
Added 5 questions: 1148 total questions1/16/2020
Added 5 questions: 1143 total questions1/15/2020
Added 5 questions: 1138 total questions1/14/2020
Added 5 questions: 1133 total questions1/13/2020
Added 5 questions: 1128 total questions1/10/2020
Added 5 questions: 1123 total questions1/9/2020
Added 5 questions: 1118 total questions1/8/2020
Added 5 questions: 1113 total questions1/7/2020
Added 5 questions: 1108 total questions1/6/2020
Page update: Electron Therapy Physics1/3/2020
Added 5 questions: 1103 total questions1/3/2020
Added 5 questions: 1098 total questions1/2/2020
Updated page: Radiobiology12/31/2019
Added 5 questions: 1093 total questions12/31/2019
Added 5 questions: 1088 total questions12/30/2019
Updated page: Radioactive Decay12/27/2019
Added 5 questions: 1083 total questions12/27/2019
Added page: Basic Radiation Physics12/26/2019
Added 5 questions: 1078 total questions12/26/2019
Added page: Treatment Planning System Commissioning, Validation, and Quality Assurance12/24/2019
Added 5 questions: 1073 total questions12/24/2019
Added 5 questions: 1068 total questions12/23/2019
Added 5 questions: 1063 total questions12/20/2019
Added 5 questions: 1058 total questions12/19/2019
Added 5 questions: 1053 total questions12/18/2019
Added 5 questions: 1048 total questions12/17/2019
Added 5 questions12/16/2019
Added 5 questions12/12/2019
Added 5 questions12/11/2019
Added 5 questions12/10/2019
Added 5 questions12/9/2019
Added page: Photon Therapy8/22/2019
Added page: Brachytherapy Treatment Sites6/24/2019
Added page: LDR and HDR Brachytherapy6/24/2019
Added Knowledge Test to: Brachytherapy Dosimetry6/3/2019
Added Knowledge Test to: Total Body Irradiation6/3/2019
Added Knowledge Test to: Total Skin Electron Therapy (TSET)6/3/2019
Added Knowledge Test to: High Dose Rate Brachytherapy6/3/2019
Added Knowledge Test to: Dose Calculations: Hand Methods6/2/2019
Added Knowledge Test to: Plan Optimization6/2/2019
Added Knowledge Test to: Photon Dose Calculation: Algorithmic Methods6/2/2019
Added Knowledge Test to: Determining Margins6/2/2019
Added Knowledge Test to: NCRP 116: Limits of Exposure to Ionizing Radiation6/1/2019
Added Knowledge Test to: Shielding for Imaging Systems6/1/2019
Added Knowledge Test to: Vault Shielding NCRP 1516/1/2019
Added Knowledge Test to: Tissue Compensators6/1/2019
Added Knowledge Test to: Magnetrons and Klystrons5/31/2019
Added Knowledge Test to: Accelerating Waveguides5/31/2019
Added Knowledge Test to: Linac Design5/31/2019
Added Knowledge Test to: Van de Graaff Accelerators5/31/2019
Added Knowledge Test to: MRI Artifacts5/30/2019
Added Knowledge Test to: Magnetic Resonance Imaging5/30/2019
Added Knowledge Test to: CT Special Topics5/30/2019
Added Knowledge Test to: Patient Positions5/30/2019
Added Knowledge Test to: CT Artifacts5/28/2019
Major Update: ABR Part 2 Practice Tests5/27/2019
Added Knowledge Test to: CT Dosimetry5/22/2019
Added Knowledge Test to: CT Basic Operations5/15/2019
Major Update: CT Basic Operations5/15/2019
Added page: CT Special Topics5/10/2019
Added Knowledge Test to: Image Registration5/7/2019
Added Knowledge Test to: Image Quality Metrics5/7/2019
Added Knowledge Test to: Kilovoltage X-ray Generation5/6/2019
Added Knowledge Test to: Plastic Scintillation Detectors5/6/2019
Added Knowledge Test to: MOSFET detectors5/6/2019
Added Knowledge Test to: Luminescent Dosimeters5/6/2019
Added Knowledge Test to: Ion Chambers5/3/2019
Added Knowledge Test to: Film5/3/2019
Added Knowledge Test to: Diode Detectors5/2/2019
Added Knowledge Test to: Common Radionuclides5/2/2019
Added Knowledge Test to: Radioactive Decay Modes4/30/2019
Added Knowledge Test to: Decay Statistics4/30/2019
Added Knowledge Test to: Radiobiology4/29/2019
Added Knowledge Test to: Electron Dose Distributions4/29/2019
Added Knowledge Test to: Cavity Theory4/29/2019
Added Knowledge Test to: Quantifying Radiation4/26/2019
Added Knowledge Test to: Interactions of Ionizing Radiation4/25/2019
Added Knowledge Test to: Types of Radiation4/25/2019
Added 15 questions: ABR Part 1: Clinical Content4/23/2019
Added 15 questions: ABR Part 1: Clinical Content4/22/2019
Update: Added EQD to Radiobiology4/22/2019
Added 5 questions: ABR Part 1: Clinical Content4/21/2019
Added 17 questions: ABR Part 1: Clinical Content4/17/2019
Added 50 questions: ABR Part 1: Clinical Content4/15/2019
Added 38 questions: ABR Part 1: Clinical Content4/11/2019
Added page: MRI Artifacts4/5/2019
Added page: Magnetic Resonance Imaging4/1/2019
Added page: Brachytherapy Quality Assurance3/29/2019
Added page: Low Dose Rate Interstital Brachytherapy: Prostate and Beyond3/27/2019
Added page: Intravascular Brachytherapy (TG-60 and TG-149)3/22/2019
Added page: Gynecological Tandem And Ovoid Brachytherapy3/21/2019
Added page: Ocular Brachytherapy: COMS Protocol and TG-1293/21/2019
Added page: Yttrium-90 Microsphere Brachytherapy (TG-144)3/19/2019
Added page: High Dose Rate Brachytherapy3/16/2019
Added page: Remote Afterloaders3/15/2019
Added page: Brachytherapy Dosimetry3/14/2019
Added page: Common Radionuclides3/14/2019
Added page: Radium-2263/14/2019
Added page: Yttrium-903/14/2019
Added page: Part 2 Test Bank3/13/2019
Added page: Part 1 Test Bank3/13/2019
Added page: All Questions3/13/2019
Added 10 questions3/5/2019
Added 10 questions3/4/2019
Added 35 questions3/3/2019
Added 10 questions3/2/2019
Added 10 questions3/1/2019
Added 10 questions2/28/2019
Added 10 questions2/27/2019
Added 5 questions2/26/2019
Added 5 questions2/25/2019
Added page: Shielding for Imaging Systems2/22/2019
Added 5 questions2/22/2019
Added 5 questions2/21/2019
Added 5 questions2/20/2019
Added page: Neutron Detectors: Bubble Detectors2/19/2019
Added 5 questions2/19/2019
Added Page: Neutron Detectors: Activation Foils2/18/2019
Added 5 Questions2/18/2019
Added 5 questions2/13/2019
Added 5 questions2/12/2019
Added 14 questions2/11/2019
Added page: Isotopes, Isobars, and Isotones2/11/2019
Major Update: Vault Shielding NCRP 1512/7/2019
Added 5 questions to Practice Tests2/6/2019
Added 5 questions to Practice Tests2/5/2019
Added 5 questions to Test Prep2/4/2019
Added page: Stopping Power1/25/2019
Added page: Cavity Theory1/24/2019
Added page: Delta Rays1/23/2019
Added page: Dose calculation: Hand Methods1/19/2019
Added page: Hand Calculations: PDD and Tissue Air Ratios1/19/2019
Added page: Hand Calculations: Monitor Units1/9/2019
Added page: Back Scatter Factor12/22/2018
Added page: Tissue Maximum Ratio12/22/2018
Added page: Tissue Phantom Ratio12/22/2018
Added page: Hand Calcualtions: Tissue Air Ratio12/18/2018
Added page: Tissue Compensators12/17/2018
Added page: Hand Calculations: Percent Depth Dose12/14/2018
Added page: Mayneord F Factor12/13/2018
Added page: Total Body Irradiation12/12/2018
Added page: Compensating Filters12/11/2018
Added page: Bolus12/10/2018
Added page: Tissue Lateral Effect12/7/2018
Added page: Hand Calculations: Scatter Factors12/6/2018
Added page: Whole Body Irradiation Effects12/5/2018
Added Page: Determining Margins11/29/2018
Added Page: Total Skin Electron Therapy (TSET)11/22/2018
Added page: Electron Percent Depth Dose11/20/2018
Added page: Bremsstrahlung (braking) radiation11/20/2018
Added page: Mycosis Fungoides11/16/2018
Added page: Optimization Methods11/8/2018
Added page: Cost Functions11/8/2018
Added page: Multi-criteria Optimization11/8/2018
Added page: Direct Machine Parameter Optimization11/6/2018
Added page: Fluence Map Optimization (FMO)11/6/2018
Added page: Dose Distribution Indexes11/6/2018
Added page: DVH Constraints11/6/2018
Added page: Effective Uniform Dose11/6/2018
Added page: Parallel and Serial Organs11/6/2018
Added page: Ray Tracing11/5/2018
Added page: VMAT Optimization: SmartArc11/5/2018
Added Page: Photon Dose Calculation: Algorithmic Methods11/4/2018
Added Section: Klystron Theory of Operation
To page: Magnetrons and Klystrons
10/25/2018
Added Section - Effective Dose
To page: Quantifying Radiation
10/8/2018
Added page: CT-on-Rails10/3/2018
Added Page: Van de Graaff Accelerators10/2/2018
Added page: Kilovoltage X-ray Generation9/27/2018
Added page: CT Dosimetry9/21/2018
Added Section - Contrast Agents
To page: CT Theory of Operation
9/20/2018
Added 9 questions - Radioactive Decay9/19/2018
Added Page: Radioactive Decay9/11/2018
Added 15 questions - Radiobiology8/10/2018
Added Page: Radiobiology8/9/2018
Added Page: CT Artifacts7/24/2018
Added Page: CT Theory of Operation7/24/2018
Added Page: CT History7/24/2018
Added page: Image Quality Metrics7/17/2018
Added page: Luminescent Dosimeters (TLD/OSLD)7/12/2018
Added page: Plastic Scintillation Detectors7/11/2018
Added Page: MOSFET Detectors7/9/2018
Added 10 questions7/7/2018
Added page: Diode Detectors7/7/2018
Added page: Film7/7/2018
Added page: Ion Chambers7/6/2018
Added 10 questions7/6/2018
Added 2 questions7/5/2018
Added 10 questions7/4/2018
Added 22 questsions7/3/2018
Added 27 questions7/2/2018
Added 11 questions7/1/2018
Added 14 questions6/30/2018
Added page: Quantifying Radiation6/29/2018
Added 25 questions6/29/2018
Added 10 questions6/28/2018
Added page: Decay Statistics6/27/2018
Added 4 questions6/27/2018
Added 27 questions6/26/2018
Added 22 questions6/25/2018