Helvecio Mota, Department of Radiation Oncology, East Carolina University, Greenville, North Carolina

Helvecio C. Mota, Ph.D.
Clinical Associate Professor

Ph.D., Institute of Biophysics, UFRJ, Rio De Janeiro, 1993

Board Certification
American Board of Radiology-Therapeutic Radiologic Physics

Research Interests

X-ray physics
Photodynamic therapy (PDT)
Structural Shielding
Cyberknife
Physics of diagnostic imaging
Radiation protection in medical practices
Image Guided Radiation Therapy
Gamma Knife radiosurgery

Selected Publications

Selected Books and monographs:
1. Acosta NP; Aguirre ML; Mota H, Ortiz P; et al. Quality control in Mammography (In Spanish), IAEA-TECDOC-1517. Vienna. 138p. October 2006.
2. Abbasi NZ, Bermudez L, Mota H, et al. Applying radiation safety standards in diagnostic radiology and interventional procedures using x rays. IAEA safety reports series #39. 110p. Vienna 2006.
3. Lima A, Giacomet A, Hazin C, Mota H, et al. Medical Radiodiagnostic: Safety and Performance of Equipment (in Portuguese). ANVISA Ed., Brasilia. 104p, 2005.
4. Xavier A, Nicoli Junior R, Souza E, Mazhari A, Monteiro I, Melo D, Rochedo E, Mota H, et al. Basic Safety Standards. (In Portuguese). CNEN-NN-3.01, Brazil. 2005.
5. HC Mota, A Fuentes, R Ortiz, SK Dias, et al. Quality Control Protocols in Diagnostic Radiology. Report IAEA/ARCAL XLIX Project (In Spanish). Mexico (Dec. 2001).
6. A Fuentes, HC Mota, R Ortiz, J.A. Puerta Ortiz, et al. Manual of Radiation Safety and Quality Assurance in Diagnostic Radiology. Report IAEA/ARCAL XLIX Project (In Spanish). Mexico (Dec. 2001).
7. Mota HC, Araujo AM, Peixoto JE, Drexler GG. Radiation Protection and Quality Control for Dental X-ray (In Portuguese). pp58, NUTES/UFRJ, Rio de Janeiro, 1994.
8. Oliveira SV e Mota HC (Eds.). Notes of the basic course on licensing and inspections in medical and dental radiology (In Portuguese). pp 104, IRD/CNEN, 1994.
9. H. Mota. Contribution to the dosimetry of clinical electron beams using Monte Carlo Techniques. Ph.D. Thesis, Federal University of Rio de Janeiro, 1993.
10. H Mota. Synergism between UV radiation and reductone in E. coli UVR+: Analysis of the produced lesions. (In Portuguese). M.Sc. Thesis, State University of Rio de Janeiro, Brazil 1980.
11. Pereira A, Sibata CH, Mota HC. Atlas of Composed Isodose Curves for Megavoltage X-ray Beams. (In Portuguese) Supplement 1 of ABFM bulletin, July 1976.

B - Selected Publications in Peer-reviewed Scientific Journals:
12. Austerlitz, C., Mota, H. C., et al. Determination of Absorbed Dose in Water at the Reference Point for a 192Ir HDR Brachytherapy Source using a Fricke System. Med. Phys. Vol. 35, issue 11 Nov 2008.
13. Austerlitz, C., Mota, H. C., et al. On the need for quality assurance in superficial kilovoltage radiotherapy. Radiation Protection Dosimetry. (doi:10.1093/rpd/ncn067), 1-6. March 2008.
14. Allison, R. R., Mota, H. C., Bagnato, V. S. & Sibata, C. H. Bio-nanotechnology and photodynamic therapy - State of the art review. Photodiagnosis and Photodynamic Therapy, 5, 19-28. 2008.
15. Gay, H. A., Allison, R. R., Downie, G. H. , Mota, H. C. et al, Toward endobronchial Ir-192 high-dose-rate brachytherapy therapeutic optimization. Physics in Medicine and Biology, 52, 2987-2999. 2007.
16. Austerlitz, C., Mota, H. C. et al.. Quality assurance of HDR 192Ir sources using a Fricke dosimeter. Medical Physics, 34 (4), 1348-1353. 2007
17. Allison RR, Gay HA, Mota HC, Sibata CH. Image-guided radiation therapy: current and future directions. Future Oncol. 2(4):477-92, Aug 2006.
18. Y Feng, R Allison, X Hu, H Mota, et al.. An Ultrasonic Device for Source to Skin Surface Distance Measurement in Patient Setup", Int J Radiat Oncol Biol Phys 61:1587-1589, 2005.
19. Allison RR, Mota HC, and Sibata CH: Clinical PD/PDT in North America: An Historical Overview. Photodiagnosis and Photodynamic Therapy, 1:263-277. 2005.
20. Nogueira M. S., Mota H. C. and Campos L. L. (Hp)Ge Measurement of Spectra for Diagnostic X-Ray Beams.. Radiation Protection Dosimetry Vol. 111, No. 1, pp. 105-110, 2004.
21. Silva, M.P., Mota, H.C.; Almeida, C.E., Verification of the calibration factor and the beam quality indices of linear accelerators. (In Portuguese). Radiol. Bras. vol 34, p.273-279. ISSN 0100-3984, Out 2001.
22. Nogueira, MS; Campos, L.L. and Mota, H.C. Determination of Conversion Coefficients between air kerma or Photon Fluency and Ambient Dose Equivalent for Diagnostic X-ray Beams. Rad. Prot. Dosimetry 81:123-132, 1999.
23. H Mota, C DeAlmeida, R diPrinzio. Accidental Patient Overexposure in a Radiation Oncology Facility. Journal of Medical Physics, v. 23, n. No. 4, p. 258-261, 1998.
24. Souza, C., Sibata, C., Mota, H. Evaluation of the eye shielding for electron beams (in Portuguese). Radiol. Bras. 30:25-29, 1997.
25. Sibata CH, Mota HC, Beddar AS. Influence of Detector Size in Photon Beam Profile Measurements. Phys. Med. Biol. 36:633-642, 1991.
26. Mota HC, Sibata CH, Roberts W. Film Dosimetry: Linearization of Dose-Response for Relative Measurements of Dose Distribution. Phys. Med. Biol. 35:565-569, 1990.
27. Sibata CH, Mota HC, Higgins PH. Influence of Hip Prostheses on High Energy Photon Dose Distribution. Int. J. Rad. Oncol. Biol. Phys. 18:445-461, 1990.
28. Mota HC, Cunha PG, Hunt JG. A multi-filter system for personal film dosimetry (in Portuguese). Rev. Fis. Apl. Instr. 5:64-77, 1990.
29. Mota HC, Vijayakumar S., Sibata CH. Posterior Spinal Cord Block: A Dosimetric Study. Radiology, 168:859-861, 1988.
30. Eder H, Schöfer H, Mota H. Routine monitoring of tube voltage with edge filters for purposes of quality control. (in Germany) Röntgenpraxis; Zeitschrift Für Radiologische Technik, ISSN: 0035-7820, May; Vol. 36 (5), pp. 173-7; PMID: 6867864, 1983
31. Leitao A, Mota HC, Alcântara Gomes R. Kinetics of DNA-induced breaks by Reductone Treatment: in vitro and in vivo studies. Photochem. Photobiol. 34:745-748, 1981.

C - Selected Abstracts in Peer-reviewed Journals and Proceedings
32. Mota, H. C., Ferreira M. et al. Clinical comparison of two IGRT techniques: CT-on rails and Megavoltage CT. Proceedings of the 50th ASTRO Meeting, Boston, Massachusetts. September 2008. Int. J. Radiat. Oncol. Biol. Phys. Vol. 72(1), supplement. P. S663. 2008.
33. deAlmeida, CE; Ochoa, R; Coelho, M; Austerlitz, C; Mota, HC.; Sibata, CH. A proposal for a novel absorbed dose to water FeSO4 based standard for Ir-192 HDR brachytherapy. Proceedings of the 50th ASTRO Meeting, Boston, Massachusetts. September 2008. Int. J. Radiat. Oncol. Biol. Phys. Vol. 72(1), supplement. P. S588-S589. 2008.
34. Mota, H. C., Austerlitz C. et al. Is an unnoticed plug or mission collimator in the Gamma Knife helmet a medical event? 14th International Meeting of the Leksell Gamma Knife Society, Quebec, Canada. May 2008.
35. Austerlitz, C., Mota, H. C. et al. Absolute absorbed dose determination in Leksell Gamma Knife with Frick dosimetry using Nanodrop. 14th International Meeting of the Leksell Gamma Knife Society. Quebec, Canada. May 2008.
36. Zhu, D; Austerlitz, C; Benhabib, S; Mota H. et al. Spherical water phantom for dosimetry fo Leksell Gamma Knife unit: A Monte Carlo Study of the wall thickness. 14th International Meeting of the Leksell Gamma Knife Society. Quebec, Canada. May 2008.
37. Mota, H. C., Ferreira, M. et al. Comparing IGRT Shifts with MVision and CT On-Rails Systems Using anthropomorphic Phantom. 50th AAPM Annual Meeting, Houston, Tx. July 2008. Medical Physics, 35 (6): 2690. June 2008.
38. Benhabib, S., Zhu, D., Austerlitz, C., Mota, H. C. et al. Dosimetric Study of HDR 192Ir and LDR 125I Brachytherapy Sources Using the Penelope Monte Carlo Code. 50th AAPM Annual Meeting. Houston, Tx. July 2008. Medical Physics, 35(6): 2726. June 2008.
39. Ferreira, M., Mota, H. C. et al.. Intercomparison Between Nucletron Plato and Simuplan Systems for Ir-193 HDR Brachytherapy Treatment Planning. 50th AAPM Annual Meeting. Houston, Tx. July 2008. Medical Physics, 35(6): 2731-2732. June 2008.
40. Zhu, D., Austerlitz, C., Mota, H. C. et al. Attenuation Due to Bronchial Stents in Photodynamic Therapy. 50th AAPM Annual Meeting. Houston Tx. July 2008. Medical Physics, 35(6): 2813. June 2008.
41. Austerlitz, C., Ferreira, M., Mota, H. C. et al. Response of the DVS for electron beams. 90th Annual Meeting of American Radium Society. Dana Point, California, May 2008. Oncology, 22(4): 61-62 - supplement, April 2008.
42. Ferreira, ML, Campos, CA, Mota, HC. et al. True in vivo dosimetry in radiation therapy of breast with photons and electrons. 90th Annual Meeting of American Radium Society. Dana Point, California, May 2008. Oncology, 22(4): 30 - supplement, April 2008.
43. Benhabib S.M., Zhu D., Austerlitz C., Mota H. et al. Determination of optical parameters of liquid phantoms for photodynamic therapy purposes. European Platform for Photodynamic Medicine Conference - EPPM-1. 24-27th March 2008, Dubrovnik. Photodiagnosis and Photodynamic Therapy, 5(1): 85 March 2008.
44. Zhu D., Benhabib S., Austerlitz C., Bonnerup C., Mota H. et al. Optical phantom for PDT using polystyrene and nigosine. European Platform for Photodynamic Medicine Conference - EPPM-1. 24-27th March 2008, Dubrovnik. Photodiagnosis and Photodynamic Therapy, 5(1): 85 March 2008.
45. Austerlitz, C., Mota, H. C. et al. Consistency of vendor specified activity values for 192Ir brachyterapy sources. ACRO 18th Annual Meeting. Miami. February 2008.
46. Austerlitz, C., Benhabib, S., Zhu, D., Mota, H. C. et al. Determination of dose at reference point for 192Ir HDR brachytherapy sources using Fricke dosimetry. ACRO 18th Annual Meeting. Miami. Feb 2008.
47. Sibata C; Mota H; et al. IGRT of brain patients: An update for our clinical experience using CT-on-rails. American Journal of Clinical Oncology 30(6) 667. December 2007.
48. Mota H. et al. A Study of the Transit dose for the Leksell Gamma Knife Model 4C using Diode and GafChromic Film in Air and Phantom. 49th AAPM Annual Meeting, Minneapolis, July 22-26. 2007.
49. Mota H. et al. Attenuation Due to Bronchial Stents in 192Ir HDR Brachytherapy. 49th AAPM Annual Meeting, Minneapolis, July 22-26. 2007.
50. Austerlitz C, Mota H. et al. The Response of the Fricke Dosimeter to Sunlight. 49th AAPM Annual Meeting, Minneapolis, July 22-26. 2007.
51. Wang W, Lee T.K., Mota H. et al. American ginseng reduces micronuclei yield in human lymphocytes after low dose radiation exposure. Proceedings of the 13th International Congress of Radiation Research. Abstract Book, PS2049. p 111. San Francisco, California, July 8-12, 2007.
52. Mota H. et al. An evaluation of the extra-target dose for the Leksell Gamma Knife model 4C (in Portuguese). XII Brazilian Congress of Medical Physics, Iguassu Falls, Brazil, June 6-9, 2007.
53. Austerlitz C, Souza V, Mota HC. et al: Effect and use of small volumes in spectrophometry for dosimetry (in Portuguese). XII Brazilian Congress in Medical Physics, Iguassu Falls, Brazil, June 6-9, 2007.
54. Austerlitz C, Mota HC. et al. Water calorimeter for PDT dosimetry (in Portuguese). XII Brazilian Congress in Medical Physics, Iguassu Falls, Brazil, June 6-9, 2007.
55. Austerlitz C., Souza V., Mota HC. et al. Comparison between free radical levels produced by light and 60Co (in Portuguese). XII Brazilian Congress in Medical Physics, Iguassu Falls, Brazil, June 6-9, 2007.
56. Sibata, C; Wolfe, M; Patel, R; Jenkins, T; Mota, H; Allison, R. User Variability for Setup Corrections Using a CT-on-rails IGRT System. Proceedings of the American Radium Society 89th Annual Meeting. Pages: 28-29. May 2007, Amsterdam.
57. Mota H., Sibata C., Lazio B., et al. In vivo measurement of secondary radiation doses from Gamma Knife 4C radiosurgery. Proceedings of the American Radium Society 89th Annual Meeting. Page 54. May 2007, Amsterdam.
58. Sibata, C; Austerlitz, C; Mota, H; Sempau, J. Monte Carlo calculation to determinate the activity of 192Ir source immersed in Fricke solution. Brazilian Journal of Cancerology (In Portuguese). Vol. 53(1). Page 133. 2007.
59. Wolfe M, Patel R., Jenkins T., Mota H. et al. Multi-Site Evaluation of User Variability for Image-Guided Radiation Therapy (IGRT) Shift Determination. Proceedings of the 48th Annual ASTRO Meeting. International Journal of Radiation Oncology Biology Physics, Volume 66, Issue 3, Supplement 1, Page S641 1, November 2006.
60. Austerlitz C, Mota H. et al. The use of Fricke Solutions to assess light dose in photodynamic therapy (PDT). Medical Physics, Volume 33, Issue 6, pp. 2024. June 2006.
61. Wolfe M., Patel R., Jenkins T., Mota H. et al. An Evaluation of User Variability for Image-Guided Radiation Therapy (IGRT) Shift Determination. Medical Physics, Volume 33, Issue 6, pp. 2144-2145 June 2006.
62. Austerlitz, C.; Mota, H.C. et al. C. Quality assurance of HDR Ir-192 sources using Fricke solution. In: 88th Annual Meeting, American Radium Society, Maui, Hawaii. 88th Annual Meeting of the American Radium Society. May 2006.
63. Sibata CH, White KS, Jenkins T, Wolfe M, Mota HC, and Allison RR: IGRT of stereotactic brain patients using the Primatom CT on rails system. ARS, Maui, Hawaii, May 2006.
64. Cuenca RE, Sibata CH, Bonnerup CH, Mota HC, Childs C, Downie GH. Green light point fluorescence spectroscopy for the detection of photosensitizer during photodynamic therapy. Society of Surgical Oncology 59th Annual Cancer Symposium, San Diego, CA. March 2006. Annals of Surgical Oncology, 13(2): 46-47, Suppl. S. Feb 2006.
65. Austerlitz, C.; Menezes, P.; Mota, H.C.; Allison, R., Sibata, C. Cytotoxity of Photogem and Photofrin upon irradiation with 6 MV x-rays. II International Workshop on IMRT/IGRT and III International Workshop in PD/PDT. Rio de Janeiro, Feb 2006.
66. Sasidharan S., Allison R., Jenkins T., Wolfe M., Mota H. and Sibata C. Interfraction Esophagus Motion Study in Image Guided Radiation Therapy (IGRT). Proceedings of the 47th Annual ASTRO Meeting. International Journal of Radiation Oncology Biology Physics, Volume 63, Supplement 1, Pages S91-S92 October 2005.
67. Jenkins T; Sibata C; Wolfe M; Patel R; Mota H. eta al. Optimized image-guided radiation therapy protocol for prostate. European Journal of Cancer Supplement 3(2): 235. October 2005.
68. Allison R, Jenkins T, Naves J, Arastu H, Wolfe M, Mota H, and Sibata C. CT on rails based adaptive radiotherapy of the prostate, ASTRO meeting, Denver CO, October 2005.
69. White K, Mota HC. et al. Use of CT based IGRT for daily set-up of frameless fractionated stereotactic patients. Submitted to AAPM, Seattle, July 2005.
70. Mota H. et al. Allison R. Improved Calibration Method of EDR Films for IMRT-QA. 47th AAPM Annual Meeting. Seattle WA, July 2005. Medical Physics, Volume 32, Issue 6, pp. 1983 June 2005.
71. Jenkins T., Sibata C., Wolfe M., Mota H. et al. Inter and intra-fraction rotational variability during radiation therapy for prostate cancer. Radiotherapy and Oncology, Volume 76, Supplement 2, Pages S72-S73, September 2005.
72. Sibata C., Jenkins T., Mota H., Arastu H. and Allison R. IGRT Clinical Experience using Siemens Primatom. Radiotherapy and Oncology, Volume 76, Supplement 2, Pages S127-S128 September 2005.
73. Mota, HC. Some recommendations of the new NCRP on shielding for radiotherapy installations (In Portuguese). X annual meeting of the Brazilian Association of Medical Physics -ABFM. Salvador, Brazil. May 2005.
74. Vilarinho, L. M. A. L., Kodlulovich, S., Mota, H.C. et al. Dose Assessment in Pediatric Computed Tomography. (In Portuguese). X annual meeting of the Brazilian Association of Medical Physics -ABFM. Salvador, Brazil. May 2005.
75. Jenkins T., Wolfe M., Feng Y., Mota H., Sibata C. and Allison R.R. A new method for image guided radiation therapy using computed tomography (abstract). Proceedings of the 46th Annual ASTRO Meeting. Intl. J. Radiat. Oncol. Biol. Phys., Volume 60, 1, Supplement 1, Page S620 September 2004.
76. Vilarinho LM, Mota HC., Dias SK. Evaluation of radiation dose in pediatric CT (in Portuguese). Proceedings of the 3rd Iberian Latin American and Caribbean Congress of Medical Physics, Rio de Janeiro. September 2004.
77. Lima M. A. F., A. Silva X., Crispim V. R., Mota H. C. Calculations of Effective Dose Conversion Coefficients for Photon spectra Clinical. Proceeding of the 3rd Iberian Latin American and Caribbean Congress of Medical Physics, Rio de Janeiro. September 2004.
78. Pereira L; Canevaro L; Carlos M; Mota H. Evaluation of the lead equivalent attenuation and of the attenuation index for individual protection vests (in Portuguese). Proceedings of the 3rd Iberian Latin American and Caribbean Congress of Medical Physics, Rio de Janeiro, September 2004.
79. Pereira L; Canevaro L; Carlos M; Mota H. Determination of the attenuation properties of the individual protection vests according IEC (in Portuguese). Proceedings of the 3rd Iberian Latin American and Caribbean Congress of Medical Physics, Rio de Janeiro, September 2004.
80. Vilarinho LM, Mota HC, Dias SK. Evaluation of the pediatric doses in Rio de Janeiro. 11th International Congress of the International Radiation Protection Association. Madrid. Proc. of IRPA 11. May 2004.
81. Nogueira, M. S., Mota, H. C., Campos, L. L. Determination of H*(D) for IEC Qualities and for Beams Transmitted by Lead Filters. 11th International Radiation Protection Association, Madrid. Proc. of IRPA
82. Ortiz López, P., Vano, E., Padovani, R., Cotelo, E., Ramírez, A., Mota, H., Faulkner, K., Balter, S. Influence of interventional radiology equipment performance on patient dose and image quality: Results of a survey under the IAEA international action plan for the radiological protection of patients. European Congress of Radiology. March 2004. (B-445).
83. Borrás C, Mota H, Skvarca JJ. Measurements of image quality and dose in 61 mammography units in 11 countries. 89th Radiological Society of North America Annual Meeting, Chicago. December 2003.
84. Ortiz-Lopez, P., Cotelo, E., Gray, J., Mota, H., Padovani, R., Vano, E. Methods of Organizing and Implementing Surveys of Patient Dose and Image Quality for the Development of Guidance (Reference) Levels. RSNA 2003. Chicago, IL Nov 30. 2003.
85. Mota HC, Vega WF, Lopes RT, Silva AX. Children and adult dose evaluation in CT using Monte Carlo Method. Proceedings of the World Congress on Medical Physics and Biomedical Engineering. Sidney, Australia. 2003.
86. Amaral E. & Mota H. Is the co-operation between regulators, employers and workers achieved optimum occupational radiation protection? Views of the Regulators. Proceedings of the International Conference on occupational radiation protection. P 369-370. Geneva, 26-30 August 2002.
87. Flores, W.; Lopes, R.T.; Mota, H.C.; Silva, A.X. Angular dependency of TLD response in computed tomography. (In Portuguese). International Nuclear Atlantic Conference - INAC. Rio de Janeiro, 11-16 August. 2002.
88. Lima, Marco Antonio F, Mota Helvécio C., Borges, José Carlos. Determination of Ambient Dose Equivalent H*(d) in radiotherapy installation. (In Portuguese). International Nuclear Atlantic Conference - INAC. Rio de Janeiro, 11-16 August. 2002.
89. Briquet, Claudia, Coutinho, Célia M.C., Mota, Helvécio. Mammography in Public Hospitals at Río de Janeiro: A Quality Assurance program. International Nuclear Atlantic Conference - INAC. Rio de Janeiro, 11-16 August. 2002.
90. Mota, HC & Austerlitz Campos, C. Effect of the exposure time on measurements of dose rate for shield evaluation in Radiodiagnostic installations. (In Portuguese). Proceedings of the VII Annual meeting of the Brazilian Association of Medical Physics. Campos do Jordão, SP, June 23-26, 2002.
91. Mahomadain K, Azevedo A, Rosa L, Gonçalves O, Guebel M, Mota H. Evaluation of the entrance skin dose due to paediatric chest x-ray examination carried out at a great hospital in Rio de Janeiro. VI Brazilian Congress of Medical Physics, Oct 2001.
92. Coutinho C., Pereira L., Mota H. C. Evaluation of the radiation protection parameters in medical radiology in Rio de Janeiro, according to the regulation MS-453. (In Portuguese). VI Brazilian Congress of Medical Physics, Oct 2001.
93. Mahomadain K E M, Rosa L A R, Bezerra M A, Mota H C. The effect of the thermal annealing procedure on LiF:Mg,Cu,P (TLD 100 H) detector TL response repeatability. VI Brazilian Congress of Medical Physics, Oct 2001.
94. Nogueira, MS.; Mota, HC. ; Campos, LL. Measurement of Spectra for Diagnostic X Ray Beams. In: Proceedings of the World Congress on Medical and Biomedical Engineering, Chicago. July 2000.
95. Mota H. Patient Radiation Protection Regulations in Latin America and the Caribbean. Symposium: Worldwide Regulatory Issues in Patient Protection. In: Proceedings of the World Congress on Medical and Biomedical Engineering, Chicago. July 2000.
96. Mota H. and Flores W. Dose assessment in CT (In Portuguese). IV Workshop in Medical Physics and Biophysics. FFCLRP-USP, Ribeirão Preto, Feb 1999.
97. Silva ET, Mota HC, Borges JC. Pediatric Radiology: doses in thorax x-ray examinations. (In Portuguese). Annals of the 1st Iberian Latin American and Caribbean Congress of Medical Physics, México, Vol 1:269-271. 1998.
98. Vieira WS, Mota HC, DeAlmeida CE, Borges JC. Postal system for calibration of Ir-192 sources. (In Portuguese) Annals of the 1st Iberian Latin American and Caribbean Congress of Medical Physics, México. Vol1:290-294. 1998.
99. Vega WF, Mota HC, Borges JC. Evaluation of doses in diagnostic computed tomography (In Spanish). Annals of the 1st Iberian Latin American and Caribbean Congress of Medical Physics, México. Vol1:93-95. 1998.
100. Mota, H.C.; Di Prinzio R.; deAlmeida, C.E. Report of an Accidental Exposure of Patients in Radiation Therapy. In: Proceedings of the World Congress on Medical Physics and Biomedical Engineering, Nice, France, 1997. V. 35. p. 1158-1158. July 1997.
101. Torres J., Mota H. and Di Prinzio R. Evaluation of accuracy of the dose delivered in radiation therapy in Brazil. (In Portuguese). III Nacional Forum on Science and Technology in Health. C. Jordão, SP, Oct 1996.
102. Mota H and Cunha P. Consideration about the quantities "dose equivalent" and "equivalent dose" (In Portuguese). VI CGEN, Rio de Janeiro, Sep 1996.
103. Mota H. C., Dias SK et al. A new model to evaluate x ray installations using dose to the patient and other risk indicators obtained by mail. IAEA meeting on BSS. Vienna Nov. 1995.
104. Sibata CH, Mota HC, Shin K. Calibration of small photon beams for stereotactic radiosurgery. Proceeding of World Congress on Medical Physics and Biomedical Engineering. Rio de Janeiro, 1994.
105. Sibata CH, Mota HC, Souza C, Ho A and Shin K. Dynamic arc therapy for total body photon irradiation. Proceedings of World Congress on Medical Physics and Biomedical Engineering. Rio de Janeiro, 1994.
106. Mota HC, Sibata, CH. Monte Carlo Study of the Therac 20 electron beam dosimetric parameters. IOMP Meeting, Kyoto, Japan. July 1991.
107. Sibata CH, Mota HC, Constantinou C. Stopping power ratio tables for selected materials used in radiation dosimetry of clinical electron beams. IOMP Meeting, Kyoto, Japan. July 1991.
108. Mota HC, Sibata. A Monte Carlo calculation of the Therac 20 electron beam spectra. AAPM annual meeting, St. Louis, MO, July 1990.
109. Beddar AS, Higgins PD, Sibata CH, Mota HC. Ionizing Radiation Effects on Optical Fibers. World Congress on Medical Physics and Biomedical Engineering, San Antonio, TX, 1988.