C. Orton

C. Orton, J. Forman, F. Shamsa, 1996, Bulletin du cancer. Radiotherapie : journal de la Societe francaise du cancer : organe de la societe francaise de radiotherapie oncologique.

Improving the therapeutic ratio of radiation in locally advanced prostate cancer: Mixed neutron/photon vs. hyperfractionated photon irradiation

C. Orton, J. Forman, F. Shamsa, 1996 .

Point/Counterpoint. IGRT has limited clinical value due to lack of accurate tumor delineation.

Lei Dong, C. Orton, C. Njeh, 2013, Medical physics.

Hyperfractionated conformal radiotherapy in locally advanced prostate cancer: results of a dose escalation study.

C. Orton, J. Forman, F. Shamsa, 1996, International journal of radiation oncology, biology, physics.

Image-guided radiotherapy is being overvalued as a clinical tool in radiation oncology.

D. Jaffray, C. Orton, H. Amols, 2006, Medical physics.

Practical Radiation Protection in Healthcare

C. Orton, D. Sutton, C. Martin, 2003 .

Dose dependence of complication rates in cervix cancer radiotherapy.

C. Orton, S. Wolf-Rosenblum, 1986, International journal of radiation oncology, biology, physics.

The title "radiation oncology physicist" should be changed to "oncologic physicist".

C. Orton, Martin W. Fraser, W. Kowalsky, 2010, Medical physics.

The AAPM should significantly revise its current governance structure.

C. Orton, C. Glide-Hurst, J. Gibbons, 2017, Medical physics.

Point/Counterpoint. MRI/CT is the future of radiotherapy treatment planning.

D. Low, C. Orton, C. Glide-Hurst, 2014, Medical physics.

POINT/COUNTERPOINT: Systemic α-particles are likely to yield more important advances in radiotherapy than are protons.

C. Orton, B. Allen, A. Chvetsov, 2015, Medical physics.

Point/Counterpoint. Peer reviews of medical physics practices often yield little information because the AAPM has not been proactive in developing appropriate peer-review guidelines.

C. Orton, P. Halvorsen, M. Gossman, 2007, Medical physics.

Is radiation-induced ovarian failure in rhesus monkeys preventable by luteinizing hormone-releasing hormone agonists?: Preliminary observations.

C. Orton, K. Ataya, A. Ramahi-Ataya, 1995, The Journal of clinical endocrinology and metabolism.

In regard to Nahum et al. (Int J Radiat Oncol Biol Phys 2003;57:391-401): Incorporating clinical measurements of hypoxia into tumor control modeling of prostate cancer: implications for the alpha/beta ratio.

C. Orton, 2004, International journal of radiation oncology, biology, physics.

Point/counterpoint: we do not need randomized clinical trials to demonstrate the superiority of proton therapy.

C. Orton, H. Sakurai, W. Robert Lee, 2012, Medical physics.

The more important heavy charged particle radiotherapy of the future is more likely to be with heavy ions rather than protons.

Alfred R. Smith, C. Orton, O. Jäkel, 2013, Medical physics.

Within the next 10-15 years protons will likely replace photons as the most common type of radiation for curative radiotherapy.

C. Orton, F. Van den Heuvel, R. Maughan, 2008, Medical physics.

Hip stiffness following mixed conformal neutron and photon radiotherapy: a dose-volume relationship.

C. Orton, J. Forman, F. Shamsa, 1996, International journal of radiation oncology, biology, physics.

The Radiation Biology of the Vascular Endothelium

C. Orton, D. Rubin, 1997 .

Elective brain irradiation for small cell anaplastic lung cancer.

C. Orton, A. Herskovic, 1986, International journal of radiation oncology, biology, physics.

Point/Counterpoint. Particle therapy is ideal for the treatment of ocular melanomas.

S. Chiu‐Tsao, C. Orton, K. Mishra, 2016, Medical physics.

Progress in medical radiation physics

C. Orton, 1982 .

Point/Counterpoint. Proton therapy is the most cost-effective modality for partial breast irradiation.

C. Orton, J. Dewyngaert, V. Ovalle, 2015, Medical physics.

Definition of T in the NSD equation

C. Orton, F. Ellis, 1974 .

Point/Counterpoint. Brachytherapy is better than external beam therapy for partial breast irradiation.

C. Orton, D. Todor, S. Becker, 2013, Medical physics.

Brachytherapy is better than external beam therapy for partial breast irradiation: Point/Counterpoint

C. Orton, D. Todor, S. Becker, 2013 .

Separating output factor into collimator factor and phantom scatter factor for megavoltage photon calculations.

C. Orton, J. Špička, D. Herron, 1988, Medical dosimetry : official journal of the American Association of Medical Dosimetrists.

Point/Counterpoint. The best radiotherapy for the treatment of prostate cancer involves hypofractionation.

J. Fowler, C. Orton, A. Nahum, 2006, Medical physics.

Time-dose factor (TDF) analysis of dose rate effects in permanent implant dosimetry.

C. Orton, B. Webber, 1977, International journal of radiation oncology, biology, physics.

Radiation departments should be certified to provide certain new technologies such as IGRT.

C. Orton, C. Njeh, Abdul Rashid, 2009, Medical physics.

The use of gadolinium-based contrast agents should be discontinued until proven safe.

C. Orton, M. Tweedle, S. Branch, 2017, Medical physics.

Point/counterpoint. Therapeutic rather than diagnostic medical physicists should lead the development and clinical implementation of image-guided nonionizing therapeutic modalities such as MR-guided high-intensity ultrasound.

R. Stafford, W. Tomé, C. Orton, 2013, Medical physics.

HDR: forget not "time" and "distance".

C. Orton, 1991, International journal of radiation oncology, biology, physics.

In the era of IGRT and small- and focal-field external beam radiotherapy, brachytherapy is a dying modality.

C. Orton, Z. Ouhib, E. Ishmael Parsai, 2017, Medical physics.

Medical physicists should seek employment elsewhere when resources are insufficient for quality patient care.

C. Orton, I. Brezovich, W. Sobol, 2007, Medical physics.

Point/Counterpoint. Miniature x-ray tubes will ultimately displace Ir-192 as the radiation sources of choice for high dose rate brachytherapy.

Colin G Orton, Bruce R Thomadsen, B. Thomadsen, 2008, Medical Physics (Lancaster).

Point/Counterpoint. Spontaneous tumors in pets are an excellent translational model for human cancers.

S. Sapareto, C. Orton, A. Vaughan, 2015, Medical physics.

A simplification in the use of the NSD concept in practical radiotherapy.

C. Orton, F. Ellis, 1973, The British journal of radiology.

A unified approach to dose-effect relationships in radiotherapy. I: Modified TDF and linear quadratic equations.

C G Orton, C. Orton, L Cohen, 1988, International journal of radiation oncology, biology, physics.

Depth dose in skin for obliquely incident 60 Co radiation.

C. Orton, J. Seibert, 1972, The British journal of radiology.

Bioeffect Dosimetry in Radiation Therapy

C. Orton, 1986 .

Mass dependence of the sensitivity of LiF-Teflon Microrod Dosimeters

C. Orton, J. Seibert, 1971 .

"Horns" on a 6MeV linear accelerator.

C. Orton, L. Reinstein, 1981, International journal of radiation oncology, biology, physics.

The role of medical physicists and the AAPM in the development of treatment planning and optimization.

Colin G Orton, Jan Unkelbach, Andrzej Niemierko, 2008, Medical physics.

Point/counterpoint. Proton therapy is too expensive for the minimal potential improvements in outcome claimed.

Alfred R. Smith, C. Orton, R. Schulz, 2007, Medical physics.

The American Brachytherapy Society recommendations for high-dose-rate brachytherapy for carcinoma of the cervix

B. Erickson, D. Petereit, S. Nag, 2000 .

The linear-quadratic model is inappropriate to model high dose per fraction effects in radiosurgery.

Colin G Orton, John P Kirkpatrick, C. Orton, 2009, Medical physics.

The American Brachytherapy Society recommendations for high-dose-rate brachytherapy for carcinoma of the cervix.

B. Erickson, D. Petereit, S. Nag, 2000, International journal of radiation oncology, biology, physics.

Point/counterpoint. Radiotherapy physicists have become glorified technicians rather than clinical scientists.

Colin G Orton, Howard I Amols, Frank Van den Heuvel, 2010, Medical physics.

Point/counterpoint. Helical tomotherapy will ultimately replace linear accelerator based IMRT as the best way to deliver conformal radiotherapy.

Colin G Orton, Daliang Cao, Tewfik Bichay, 2008, Medical physics.

Point/counterpoint: backscatter x-ray machines at airports are safe.

E. Hindié, C. Orton, D. J. Brenner, 2012, Medical physics.

Time-dose factors (TDFs) in brachytherapy.

C G Orton, C. Orton, 1974, The British journal of radiology.

High and low dose-rate brachytherapy for cervical carcinoma.

C. Orton, 1998, Acta oncologica.

The measurement of teletherapy unit timer errors.

C G Orton, J B Seibert, C. Orton, 1972, Physics in medicine and biology.

Surface effects of high-energy x-rays at oblique incidence.

C. Orton, J. Seibert, 1971, The British journal of radiology.

Point/Counterpoint. Exposure limits for emergency responders should be the same as the prevailing limits for occupational radiation workers.

C. Orton, E. Hendee, R. H. Kitchen, 2007, Medical physics.

SI units of TDF.

C. Orton, 1980, The British journal of radiology.

Point/counterpoint. Simultaneous PET/MR will replace PET/CT as the molecular multimodality imaging platform of choice.

Habib Zaidi, Osama Mawlawi, Colin G Orton, 2007, Medical physics.

Point/counterpoint. The h index is the best measure of a scientist's research productivity.

Clive Baldock, Colin G Orton, C. Orton, 2009, Medical physics.

Point/counterpoint. IMRT should not be administered at photon energies greater than 10 MV.

F. Nüsslin, C. Orton, D. Followill, 2007, Medical physics.

The future of IMRT/SBRT lies in the use of unflattened x-ray beams.

Colin G Orton, C. Orton, Chihray R Liu, 2013, Medical physics.

Radiation Dosimetry

C. Orton, 1986, Springer US.

Future developments in external beam radiotherapy will be unlikely to significantly improve treatment outcomes over those currently achieved with 3D-conformal and IMRT treatments.

C. Orton, D. Verellen, R. Schulz, 2007, Medical physics.

"SABER": A new software tool for radiotherapy treatment plan evaluation.

Bo Zhao, Colin G Orton, Jay Burmeister, 2010, Medical physics.

Models in radiotherapy: volume effects.

T E Schultheiss, C G Orton, C. Orton, 1983, Medical physics.

14 – High Dose Rate Brachytherapy

J. Pouliot, S. Nag, C. Orton, 2010 .

Width of the therapeutic window: what is the optimal dose-per-fraction for high dose rate cervix cancer brachytherapy?

C. Orton, 1995, International journal of radiation oncology, biology, physics.

Multifractionated high-dose-rate brachytherapy with concomitant daily teletherapy for cervical cancer.

C. Orton, A. Porter, V. Malviya, 1996, Gynecologic oncology.

Remote controlled high dose rate brachytherapy.

S. Nag, B. Thomadsen, C. Orton, 1996, Critical reviews in oncology/hematology.

Comparison of high and low dose rate remote afterloading for cervix cancer and the importance of fractionation.

C. Orton, M. Seyedsadr, A. Somnay, 1991, International journal of radiation oncology, biology, physics.

Advocating for use of the ALARA principle in the context of medical imaging fails to recognize that the risk is hypothetical and so serves to reinforce patients' fears of radiation.

C. McCollough, C. Orton, J. Siegel, 2017, Medical physics.

Tumor hypoxia is an important mechanism of radioresistance in hypofractionated radiotherapy and must be considered in the treatment planning process.

C. Orton, K. Yenice, D. Carlson, 2011, Medical physics.

Study of lung density corrections in a clinical trial (RTOG 88-08). Radiation Therapy Oncology Group.

C. Orton, W. Sause, T. Schultheiss, 1998, International journal of radiation oncology, biology, physics.

A proposal for universal introduction of lung corrections.

C. Orton, A. Herskovic, 1984, International journal of radiation oncology, biology, physics.

Lung corrections in photon beam treatment planning: are we ready?

C. Orton, J. Spicka, D. Herron, 1984, International journal of radiation oncology, biology, physics.

Changes and demands in the higher education sector are increasingly making advanced degree medical physics programs nonviable and the profession will have to develop a new model for delivering such education.

Colin G Orton, Andrew Fielding, Joann I Prisciandaro, 2018, Medical physics.

Point/counterpoint. Most residency programs for radiation oncology physicists do not reflect the heightened importance of medical imaging.

X. Zhu, C. Orton, R. Das, 2010, Medical physics.

Practical aspects of electron beam treatment planning : proceedings of the Practical Aspects of Electron Beam Treatment Planning Symposium on July 31, 1977 in Cincinnati, Ohio

Colin G. Orton, Farideh Bagne, C. Orton, 1978 .

A unified approach to dose-effect relationships in radiotherapy. II: Inhomogeneous dose distributions.

C G Orton, C. Orton, 1988, International journal of radiation oncology, biology, physics.

Despite widespread use there is no convincing evidence that static magnets are effective for the relief of pain.

C. Orton, M. Pittler, T. Harlow, 2008, Medical physics.

Within the next five years CT colonography will make conventional colonoscopy obsolete for colon cancer screening.

C. Orton, Hiro Yoshida, A. Svoboda, 2006, Medical physics.

Measurement of dose distributions with red Perspex.

C. Orton, C. Marshall, 1966, Physics in Medicine and Biology.

Red Perspex dosimetry.

C. Orton, 1966, Physics in medicine and biology.

High-dose-rate brachytherapy may be radiobiologically superior to low-dose rate due to slow repair of late-responding normal tissue cells.

C. Orton, 2001, International journal of radiation oncology, biology, physics.

Combined low-dose-rate brachytherapy and external beam radiation for cervical cancer: experience over ten years.

C. Orton, F. Shamsa, A. Porter, 1999, Radiation oncology investigations.

Point/counterpoint. To ensure that target volumes are not underirradiated when respiratory motion may affect the dose distribution, 4D dose calculations should be performed.

George Starkschall, Colin G Orton, G. Starkschall, 2008, Medical physics.

Recent data show that mammographic screening of asymptomatic women is effective and essential.

R. Hendrick, C. Orton, K. Jørgensen, 2012, Medical physics.

Transmission blocks: clinical and biological rationales.

G. Ezzell, C. Orton, A. Herskovic, 1985, International journal of radiation oncology, biology, physics.

Point/counterpoint. Medical physics residents should be placed using a matching program.

Colin G Orton, Stephen Sapareto, X Ronald Zhu, 2014, Medical physics.

The use of a constant RBE=1.1 for proton radiotherapy is no longer appropriate.

C. Orton, P. Deluca, J. Ödén, 2018, Medical physics.

Preliminary results of a hyperfractionated dose escalation study for locally advanced adenocarcinoma of the prostate.

G. Ezzell, C. Orton, J. Forman, 1993, Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology.

Nominal standard dose (NSD) and radiation tolerance of the pig kidney.

C. Orton, 1976, International journal of radiation oncology, biology, physics.

Models in radiotherapy: definition of decision criteria.

T E Schultheiss, C G Orton, C. Orton, 1985, Medical physics.

Point/Counterpoint. A 3D-conformal technique is better than IMRT or VMAT for lung SBRT.

C. Orton, Jing Cai, H. Malhotra, 2014, Medical physics.

Point/Counterpoint. Radiotherapy using hard wedges is no longer appropriate and should be discontinued.

Tae Suk Suh, Colin G Orton, Christopher F Njeh, 2016, Medical physics.

The American brachytherapy society survey of brachytherapy practice for carcinoma of the cervix in the United States.

S Nag, B Erickson, B. Erickson, 1999, Gynecologic oncology.

Point/Counterpoint. Future radiotherapy practice will be based on evidence from retrospective interrogation of linked clinical data sources rather than prospective randomized controlled clinical trials.

A. Dekker, C. Orton, S. Gulliford, 2014, Medical physics.

Point/Counterpoint. Patient-specific QA for IMRT should be performed using software rather than hardware methods.

Colin G Orton, Andrea Molineu, Ramon Alfredo C Siochi, 2013, Medical physics.

Point/counterpoint. It is still necessary to validate each individual IMRT treatment plan with dosimetric measurements before delivery.

Colin G Orton, Sonja Dieterich, J. C. Smith, 2011, Medical physics.

Implanted fiducial markers are no longer needed for prostate cancer radiotherapy.

Colin G Orton, Christopher F Njeh, C. Orton, 2017, Medical physics.

Point/Counterpoint: The disadvantages of a multileaf collimator for proton radiotherapy outweigh its advantages.

Colin G Orton, Juliane Daartz, Richard L Maughan, 2014, Medical physics.

Quality Assessment and Improvement of Dose Response Models: Some Effects of Study Weaknesses on Study Findings "C'est Magnifique?"

B. Paliwal, C. Orton, M. Stovall, 1993 .

What minimum number of fractions is required with high dose-rate remote afterloading?

C. Orton, 1987, British Journal of Radiology.

HDR vs LDR for CA cervix: High risk or biased reporting?

C. Orton, 1992 .

American Brachytherapy Society recommendations for clinical implementation of NIST-1999 standards for 103palladium brachytherapy

Ravinder Nath, Colin G. Orton, J. Blasko, 2000 .

Radiation dosimetry : physical and biological aspects

C. Orton, 1986 .

American brachytherapy society recommendations for clinical implementation of nist-1999 standards for palladium-103 brachytherapy. Authors' reply

J. Blasko, B. Vikram, W. Butler, 2001 .

In response to Drs. Vikram, Anderson, and King

J. Blasko, W. Butler, G. Merrick, 2001 .

Point/Counterpoint. Evaluation of treatment plans using target and normal tissue DVHs is no longer appropriate.

C. Orton, C. Njeh, B. Parker, 2015, Medical physics.

Point/counterpoint: vendor provided machine data should never be used as a substitute for fully commissioning a linear accelerator.

Colin G Orton, Indra J Das, Christopher F Njeh, 2012, Medical physics.

Fundamental biophysical aspects of high-energy radiations in cancer therapy.

C. Orton, 1974, Transactions of the New York Academy of Sciences.

Co-60 tomotherapy is the treatment modality of choice for developing countries in transition toward IMRT.

B. Paliwal, C. Orton, P. Cadman, 2010, Medical physics.

Point/counterpoint. The traditional L-shaped gantry for radiotherapy linear accelerators will soon become obsolete.

Fang-Fang Yin, Colin G Orton, Joseph Stancanello, 2010, Medical physics.

Clear Perspex dosimetry.

C. Orton, 1966, Physics in medicine and biology.

Quality and Safety in Radiotherapy.

Colin G. Orton, C. J. Karzmark, Patrick N. McDermott, 2011, Medical physics.

Medical Physics should adopt double-blind peer review of all manuscripts.

A. K. Jones, C. Orton, H. Palmans, 2010, Medical physics.

Point/Counterpoint. The future h-index is an excellent way to predict scientists' future impact.

Colin G Orton, Orion Penner, Daniel E Acuna, 2013, Medical physics.

The future h -index is an excellent way to predict scientistsˈ future impact: Point/Counterpoint

Colin G. Orton, Daniel E. Acuna, Orion Penner, 2013 .

Point/counterpoint. The use of effective dose for medical procedures is inappropriate.

W. Huda, C. Orton, C. Borrás, 2010, Medical physics.

Point/Counterpoint. Radiation departments should be certified to provide certain new technologies such as IGRT.

C. Orton, C. Njeh, Abdul Rashid, 2009, Medical Physics (Lancaster).

Contrast enhancement of high-energy radiotherapy films.

L E Reinstein, C G Orton, C. Orton, 1979, The British journal of radiology.

EPID dosimetry must soon become an essential component of IMRT quality assurance.

Wouter van Elmpt, Gary A. Ezzell, Colin G. Orton, 2009, Medical physics.

Point/Counterpoint. Noncoplanar beams improve dosimetry quality for extracranial intensity modulated radiotherapy and should be used more extensively.

Ke Sheng, David M Shepard, Colin G Orton, 2015, Medical physics.

Point/Counterpoint. Medical use of all high activity sources should be eliminated for security concerns.

C. Orton, J. Capala, S. Goetsch, 2015, Medical Physics (Lancaster).

Design of compensators for patients with HIP prostheses undergoing pelvic irradiation

C. Orton, R. Alecu, J. Feldmeier, 1995 .

Peer reviews of medical physics practices often yield little information because the AAPM has not been proactive in developing appropriate peer-review guidelines.

C. Orton, P. Halvorsen, M. Gossman, 2007, Medical physics.

High and Low Dose Rate Remote Afterloading: A Critical Comparison

C. Orton, 1991 .

Photosensitivity of clear perspex dosimeters.

C. Orton, 1968, The International journal of applied radiation and isotopes.

Survival and complications in stage I carcinoma of corpus uteri receiving post-operative irradiation.

C. Orton, D. S. Murrell, 1988, Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology.

Fractionation is important for HDR cervix cancer brachytherapy.

C. Orton, 1992, International journal of radiation oncology, biology, physics.

HDR in gynecological applications: dose and volume considerations.

C. Orton, 1991, International journal of radiation oncology, biology, physics.

Ultrasonography is soon likely to become a viable alternative to x-ray mammography for breast cancer screening.

Andrew D. A. Maidment, C. Orton, C. Glide-Hurst, 2010, Medical physics.

Neutron and photon clonogenic survival curves of two chemotherapy resistant human intermediate-grade non-Hodgkin lymphoma cell lines.

R. Mohammad, C. Orton, A. Al-Katib, 1999, International journal of radiation oncology, biology, physics.

The use of a constant RBE=1.1 for proton radiotherapy is no longer appropriate.

C. Orton, P. Deluca, J. Ödén, 2018, Medical physics.

Point/counterpoint: computer-aided detection should be used routinely to assist screening mammogram interpretation.

Colin G Orton, Robert M Nishikawa, R. Nishikawa, 2012, Medical physics.

Point/counterpoint. PDT is better than alternative therapies such as brachytherapy, electron beams, or low-energy x rays for the treatment of skin cancers.

T. Zhu, C. Orton, E. Parsai, 2011, Medical physics.

Point/Counterpoint: Within the next ten years treatment planning will become fully automated without the need for human intervention.

Colin G Orton, Michael B Sharpe, Kevin L Moore, 2014, Medical physics.