MyMedR

Brief histories of medical physics in Asia-Oceania

Round WH, Jafari S, Kron T, Azhari HA, Chhom S, Hu Y, et al.

Australas Phys Eng Sci Med, 2015 Sep;38(3):381-98.

PMID: 25894289 DOI: 10.1007/s13246-015-0342-9

The history of medical physics in Asia-Oceania goes back to the late nineteenth century when X-ray imaging was introduced, although medical physicists were not appointed until much later. Medical physics developed very quickly in some countries, but in others the socio-economic situation as such prevented it being established for many years. In others, the political situation and war has impeded its development. In many countries their medical physics history has not been well recorded and there is a danger that it will be lost to future generations. In this paper, brief histories of the development of medical physics in most countries in Asia-Oceania are presented by a large number of authors to serve as a record. The histories are necessarily brief; otherwise the paper would quickly turn into a book of hundreds of pages. The emphasis in each history as recorded here varies as the focus and culture of the countries as well as the length of their histories varies considerably.

Denture hyperplasia and oncocytic metaplasia

Siar CH, Ng KH, Ngui CH

Ann Dent, 1992;51(1):27-8.

PMID: 1632623

A case of denture hyperplasia of the upper labial sulcus with concomitant oncocytic metaplastic changes is described. The patient concerned is an elderly male wearing an ill-fitting upper full denture.

Microwave-stimulated decalcification of compact bones

Ng KH, Ng LL

Eur J Morphol, 1992;30(2):150-5.

PMID: 1457250

Fulltext BIIJ embracing social media

Kadri N, Ng Kh

Biomed Imaging Interv J, 2010 Jan-Mar;6(1):e1.

PMID: 21611061 DOI: 10.2349/biij.6.1.e1

Fulltext A survey of radiation dose to patients and operators during radiofrequency ablation using computed tomography

Saidatul A, Azlan C, Megat Amin M, Abdullah B, Ng Kh

Biomed Imaging Interv J, 2010 Jan-Mar;6(1):e1.

PMID: 21611060 MyJurnal DOI: 10.2349/biij.6.1.e2

Computed tomography (CT) fluoroscopy is able to give real time images to a physician undertaking minimally invasive procedures such as biopsies, percutaneous drainage, and radio frequency ablation (RFA). Both operators executing the procedure and patients too, are thus at risk of radiation exposure during a CT fluoroscopy.This study focuses on the radiation exposure present during a series of radio frequency ablation (RFA) procedures, and used Gafchromic film (Type XR-QA; International Specialty Products, USA) and thermoluminescent dosimeters (TLD-100H; Bicron, USA) to measure the radiation received by patients undergoing treatment, and also operators subject to scatter radiation.The voltage was held constant at 120 kVp and the current 70mA, with 5mm thickness. The duration of irradiation was between 150-638 seconds.Ultimately, from a sample of 30 liver that have undergone RFA, the study revealed that the operator received the highest dose at the hands, which was followed by the eyes and thyroid, while secondary staff dosage was moderately uniform across all parts of the body that were measured.

Fulltext Riding on the crest of electronic publishing wave

Kadri N, Tan L, Ng Kh

Biomed Imaging Interv J, 2009 Jan;5(1):e1.

PMID: 21611022 MyJurnal DOI: 10.2349/biij.5.1.e1

Fulltext Mirror, mirror, on the wall, will my submission say it all?

Abdullah B, Ng Kh

Biomed Imaging Interv J, 2007 Jan;3(1):e1.

PMID: 21614254 DOI: 10.2349/biij.3.1.e1

Fulltext Is the glass half full or half empty?

Abdullah B, Ng Kh

Biomed Imaging Interv J, 2007 Apr;3(2):e48.

PMID: 21614281 MyJurnal DOI: 10.2349/biij.3.2.e48

Fulltext Real-time teleteaching in medical physics

Woo M, Ng Kh

Biomed Imaging Interv J, 2008 Jan;4(1):e13.

PMID: 21614306 MyJurnal DOI: 10.2349/biij.4.1.e13

Medical physics is a relatively small professional community, usually with a scarcity of expertise that could greatly benefit students entering the field. However, the reach of the profession can span great geographical distances, making the training of students a difficult task. In addition to the requirement of training new students, the evolving field of medical physics, with its many emerging advanced techniques and technologies, could benefit greatly from ongoing continuing education as well as consultation with experts.Many continuing education courses and workshops are constantly being offered, including many web-based study courses and virtual libraries. However, one mode of education and communication that has not been widely used is the real-time interactive process. Video-based conferencing systems do exist, but these usually require a substantial amount of effort and cost to set up.The authors have been working on promoting the ever-expanding capability of the Internet to facilitate the education of medical physics to students entering the field. A pilot project has been carried out for six years and reported previously. The project is a collaboration between the Department of Medical Physics at the Toronto Odette Cancer Centre in Canada and the Department of Biomedical Imaging at the University of Malaya in Malaysia. Since 2001, medical physics graduate students at the University of Malaya have been taught by lecturers from Toronto every year, using the Internet as the main tool of communication.The pilot study explored the different methods that can be used to provide real-time interactive remote education, and delivered traditional classroom lectures as well as hands-on workshops.Another similar project was started in 2007 to offer real-time teaching to a class of medical physics students at Wuhan University in Hubei, China. There are new challenges as well as new opportunities associated with this project. By building an inventory of tools and experiences, the intent is to broaden the real-time teleteaching method to serve a wide community so that future students entering the field can have efficient access to high-quality education that will benefit the profession in the long term.

Fulltext Medical politics 101

Abdullah B, Ng Kh

Biomed Imaging Interv J, 2007 Jul;3(3):e13.

PMID: 21614283 MyJurnal DOI: 10.2349/biij.3.3.e13

Fulltext The sky is falling

Abdullah B, Ng Kh

Biomed Imaging Interv J, 2006 Jul;2(3):e29.

PMID: 21614242 DOI: 10.2349/biij.2.3.e29

Fulltext Diffusion weighted MR imaging in acute vertebral compression fractures: differentiation between malignant and benign causes

Bhugaloo A, Abdullah B, Siow Y, Ng Kh

Biomed Imaging Interv J, 2006 Apr;2(2):e12.

PMID: 21614224 MyJurnal DOI: 10.2349/biij.2.2.e12

The primary objective of this study was to evaluate the specificity and sensitivity of diffusion weighted MR imaging (DWI) in the differentiation and characterisation between benign and malignant vertebral compression fractures compared with conventional T1 WI, T2 WI and fat suppressed contrast enhanced T1 WI in the Malaysian population.

Fulltext Exploring new vistas in biomedical journal publishing

Abdullah B, Ng Kh

Biomed Imaging Interv J, 2006 Oct;2(4):e51.

PMID: 21614333 DOI: 10.2349/biij.2.4.e51

Fulltext Improved fracture detection using the mammographic film-screen combination

Faridah Y, Abdullah B, Ng Kh

Biomed Imaging Interv J, 2005 Jul;1(1):e3.

PMID: 21625275 DOI: 10.2349/biij.1.1.e3

The single emulsion or single screen system is usually reserved for mammography since its use in general radiography is limited. The purpose of this study is to compare the mammographic film-screen combination (MFC) and the standard film-screen combination (SFC) in terms of fracture and soft tissue injuries detection. PATIENTS, METHODS AND MATERIALS: In this prospective study, 41 patients from Accident and Emergency suspected of having injury in the hands, wrists, ankles and feet regions were radiographed using both MFC and SFC. These were compared in terms of image quality, presence of fractures and soft tissue injuries. The two different film-screen combinations were also compared in terms of detection of bony fragments, film characteristics such as film speed, contrast and spatial resolution, dose and cost.

Fulltext The birth of an open access multidisciplinary online journal

Abdullah B, Ng Kh

Biomed Imaging Interv J, 2005 Jul;1(1):e1.

PMID: 21625273 DOI: 10.2349/biij.1.1.e1

Fulltext Change is just more of the same

Abdullah B, Ng Kh

Biomed Imaging Interv J, 2008 Oct;4(4):e36.

PMID: 21611018 DOI: 10.2349/biij.4.4.e36

Oral candidosis in non-Hodgkin's lymphoma: a case report

Siar CH, Ng KH, Rasool S, Ram S, Abdul Jalil A, Ng KP

J Oral Sci, 2003 Sep;45(3):161-4.

PMID: 14650581

Though oral candidosis is an opportunistic fungal infection that commonly affects immunocompromised patients, little is known of its occurrence as a complication of Non-Hodgkin's lymphoma. This paper reports a case of oral candidosis in a 20-year-old Indonesian woman with this lymphoproliferative disease. She presented with acute pseudomembranous candidosis on the dorsum and lateral borders of the tongue, bilateral angular cheilitis and cheilocandidosis. The latter is a rare clinical variant of oral candidosis, and the lesions affecting the vermilion borders presented as an admixture of superficial erosions, ulcers and white plaques. Clinical findings were confirmed with oral smears and swabs that demonstrated the presence of hyphae, pseudohyphae and blastospores, and colonies identified as Candida albicans. A culture from a saline rinse was also positive for multiple candidal colonies. Lip and oral lesions were managed with Nystatin. The lesions regressed with subsequent crusting on the lips, and overall reduction in oral thrush. As Non-Hodgkin's lymphoma is a neoplastic disease that produces a chronic immunosuppressive state, management of its oral complications, including those due to oral candidosis, is considered a long-term indication.

Surveying trends in radiation oncology medical physics in the Asia Pacific Region

Kron T, Healy B, Ng KH

Phys Med, 2016 Jul;32(7):883-8.

PMID: 27320695 DOI: 10.1016/j.ejmp.2016.06.001

OBJECTIVE: Our study aims to assess and track work load, working conditions and professional recognition of radiation oncology medical physicists (ROMPs) in the Asia Pacific Region over time.

METHODS: A structured questionnaire was mailed in 2008, 2011 and 2014 to senior medical physicists representing 23 countries. The questionnaire covers 7 themes: education and training including certification; staffing; typical tasks; professional organisations; resources; research and teaching; job satisfaction.

RESULTS: Across all surveys the response rate was >85% with the replies representing practice affecting more than half of the world's population. The expectation of ROMP qualifications (MSc and between 1 and 3years of clinical experience) has not changed much over the years. However, compared to 2008, the number of medical physicists in many countries has doubled. Formal professional certification is only available in a small number of countries. The number of experienced ROMPs is small in particular in low and middle income countries. The increase in staff numbers from 2008 to 2014 is matched by a similar increase in the number of treatment units which is accompanied by an increase in treatment complexity. Many ROMPs are required to work overtime and not many find time for research. Resource availability has only improved marginally and ROMPs still feel generally overworked, but professional recognition, while varying widely, appears to be improving slowly.

CONCLUSION: While number of physicists and complexity of treatment techniques and technologies have increased significantly, ROMP practice remains essentially unchanged over the last 6years in the Asia Pacific Region.

Comparative assessment of the interfacial soft and hard tissues investing implants and natural teeth in the macaque mandible

Siar CH, Toh CG, Romanos GE, Ng KH

Clin Oral Investig, 2015 Jul;19(6):1353-62.

PMID: 25411082 DOI: 10.1007/s00784-014-1362-7

The aim of this study was to conduct a comparative qualitative and quantitative assessment of the interfacial soft and hard tissues investing implants and natural teeth.

RANK, RANKL, and OPG in recurrent solid/multicystic ameloblastoma: their distribution patterns and biologic significance

Siar CH, Tsujigiwa H, Ishak I, Hussin NM, Nagatsuka H, Ng KH

Oral Surg Oral Med Oral Pathol Oral Radiol, 2015 Jan;119(1):83-91.

PMID: 25446507 DOI: 10.1016/j.oooo.2014.09.017

To determine the distribution patterns of bone resorption regulators, receptor activator of nuclear factor κ-B (RANK), RANK ligand (RANKL), and osteoprotegerin (OPG) in recurrent ameloblastoma (RAs) and to clarify their impact on the biologic behavior of these neoplasms.

Displaying publications 81 - 100 of 283 in total