As a kind of class II medical device, medical optical radiation protective eyewears should meet the requirements of safety and effectiveness. In this study, the evaluation system of medical optical radiation protective eyewears is established. Combined with the medical device registration unit division guidelines, the classification method of medical optical radiation protective eyewears is given. Medical optical radiation protective eyewears are not only assembled spectacles, but also have special optical radiation protection performance. The performance evaluation method of medical optical radiation protective eyewears and the evaluation method of shelf life for medical optical radiation protective eyewears are given.
Radiation Protection

Background: The ionizing radiation produced by X-ray baggage scanners may cause harmful health effects to the health of occupational workers and members of the public. Hence, the International Commission on Radiological Protection recommends that radiation exposures from X-ray baggage scanners be kept as low as reasonably achievable. Objectives: This study was done to assess the occupational risk from the measured ambient radiation from anti-crime X-ray scanners from a hotel and a port facility in Metro Manila. This was done by comparing the measured radiation levels with the acceptable limits required by the Center for Device Regulation, Radiation Health, and Research (CDRRHR) –Department of Health (DOH) – Food and Drug Administration (FDA). Methodology: Ambient radiation of X-ray baggage scanners from Manila North Harbour Port Inc. (MNHPI) and Marriott Hotel Manila (MHM) were measured using RaySafe Xi survey detector while both machines were in operation. Measurements were done at a five-cm distance from the surface of the scanner console, front, back, left, and right sides. Peak measurements of ambient radiation were then obtained to overestimate the scattered radiation dose received by the worker assigned to the scanner. Values from the peak measurement were then compared with the limits set by the CDRRHR-DOH-FDA. Results: The maximum measured ambient radiations at 5 cm from the surface of the machine were 0.590 μSv/hr and 3.519 μSv/hr from MNHPI and MHM, respectively. Both peak measurements were less than the 5.000 μSv/hr limit set by the CDRRHR-DOH-FDA. Conclusion Measurements from both facilities are within the required limit of the 5 μSv/hr at 5 cm distance from the external surface of the X-ray baggage scanner, set by the CDRRHR-DOH-FDA. It was also seen that the calculated annual occupation dose of the operator is within the limits set by ICRP. It is also recommended to study measuring at other distances from the surface of the scanner to determine whether safety protocols should be reassessed.
Radiation Protection

BACKGROUND: Recently, concerns regarding protection provided by sunscreens in the UVA spectrum have been raised. But there is no standard testing protocol for quantifying this protection. OBJECTIVE: As an ideal test methodology, the PFA test using the concept of minimal pigment darkening dose(MPPD) was evaluated to determine its ability to quantify the UVA protection provided by a sunscreen. METHODS: Sunscreen products were tested on unsensitized women subjects with both UVA from a Sellas UVA lamp in a protocol similar to the sun protection factor test(SPF) and UVB by the SPF protocol. RESULTS: The protection factors in UVA ranged from 5.0 to 5.3 depending on the type of absorber and the UVB blocking filter. CONCLUSION: This test method provides a realistic in vivo estimate of the amount of UVA protection provided by sunscreens.
Female ; Humans ; Sun Protection Factor ; Sunscreening Agents*

BACKGROUND: The C-arm fluoroscope is an essential tool for the intervention of pain. The aim of this study was to investigate the radiation exposure experienced by the hand and chest of pain physicians during C-arm fluoroscopy-guided procedures. METHODS: This is a prospective study about radiation exposure to physicians during transforaminal epidural steroid injection (TFESI) and medial branch block (MBB). Four pain physicians were involved in this study. Data about effective dose (ED) at each physician's right hand and left side of the chest, exposure time, radiation absorbed dose (RAD), and the distance from the center of the X-ray field to the physician during X-ray scanning were collected. RESULTS: Three hundred and fifteen cases were included for this study. Demographic data showed no significant differences among the physicians in the TFESIs and MBBs. In the TFESI group, there was a significant difference between the ED at the hand and chest in all the physicians. In physician A, B and C, the ED at the chest was more than the ED at the hand. The distance from the center of the X-ray field to physician A was more than that of the other physicians, and for the exposure time, the ED and RAD in physician A was less than that of the other physicians. In the MBB group, there was no difference in the ED at the hand and chest, except for physician D. The distance from the center of the X-ray field to physician A was more than that of the other physicians and the exposure time in physician A was less than that of the other physicians. CONCLUSIONS: In conclusion, the distance from the radiation source, position of the hand, experience and technique can correlate with the radiation dose.
Hand ; Prospective Studies ; Radiation Protection ; Thorax

The shielding materials designed for replacement of lead equivalent materials for lighter apron than that of lead in diagnostic photon beams. The absorption characteristics of elements were applied to investigate the lead free material for design the shielding materials through the 50 kVp to 110 kVp x-ray energy in interval of 20 kVp respectively. The idea focused to the effect of K-edge absorption of variable elements excluding the lead material for weight reduction. The designed shielding materials composited of Tin 34.1%, Antimon 33.8% and Iodine 26.8% and Polyisoprene 5.3% gram weight account for 84 percent of weight of lead equivalent of 0.5 mm thickness. The size of lead-free shielder was 200x200x1.5 mm3 and 3.2 g/cm3 of density which is equivalent to 0.42 mm of Pb. The lead equivalent of 0.5 mm thickness generally used for shielding apron of diagnostic X rays which is transmitted 0.1% for 50 kVp, 0.9% for 70 kVp and 3.2% for 90 kVp and 4.8% for 110 kVp in experimental measurements. The experiment of transmittance for lead-free shielder has showed 0.3% for 50 kVp, 0.6% for 70 kVp, 2.0% for 90 kVp and 4.2% for 110 kVp within 0.1%. respectively. Using the attenuation coefficient of experiments for 0.5 mm Pb equivalent of lead-free materials showed 0.1%. 0.3%, 1.0% and 2.4%, respectively. Furthermore, the transmittance of lead-free shielder for scatter rays has showed the 2.4% in operation energy of 50 kVp and 5.9% in energy of 110 kVp against 2.4% and 5.1% for standard lead thickness within 0.2% discrepancy, respectively. In this experiment shows the designed lead-free shielder is very effective for reduction the apron weight in diagnostic radiation fields.
Absorption ; Iodine ; Radiation Protection ; Tin ; Weight Loss

The link between micro- and macro-parameters for radiation interactions that take place in living biological systems is described in this paper. Meanwhile recent progress and development in microdosimetry and nanodosimetry are introduced, including the methods to measure and calculate these micro- or nano-parameters. The relationship between radiobiology and physical quantities in microdosimetry and nanodosimetry was presented. Both the current problems on their applications in radiation protection and radiotherapy and the future development direction are proposed.
Humans ; Physics ; Radiation Protection ; Radiobiology ; Radiometry

As Malaysia races towards a developed nation status, children are increasingly being ferried daily in vehicles almost exclusively as the majority of the population are able to afford private transportations. This paper reviews the current safety concerns for children whilst going in vehicles on Malaysian roads and the steps undertaken to address the need to enhance children’s safety whilst going in these vehicles and suggest possible remedial action to counter the possible lack of awareness for children’s safety whilst in these vehicles. This paper focuses on children on motorcycles and private vehicles (cars, vans and multi-purpose vehicle (MPV)) and excludes other form of transport (buses, lorries) as this paper tries to put forth measures that can be undertaken by the children’s parents and guardian to better enhance the safety of their children. A search was undertaken of all the major database of articles. Articles related to children’s safety systems, children related injuries, children related accident data, available laws and legislation were reviewed to present the need for greater awareness of children’s safety while going in vehicles in Malaysia. There are currently already safety legislations, measures, steps and equipments in place in ensuring the safety of children whilst going in vehicles on Malaysian roads. However, enforcement of laws in developing countries are not easy and we have to start at the root of the problem which is the parents and adults who ferry these children in vehicles. There is a pressing need to educate parents and adults alike on the urgent undertaking of child safety whilst in vehicles. Engineering countermeasures and intervention are probably needed to protect these vulnerable users. For vehicles, a device capable of providing some sort of protection to the child whilst riding pillion should be designed and developed. A legislation mandating the use of child seats whilst ensuring the child seats are affordable to the masses.
Children ; safety ; vehicles ; Malaysia ; awareness ; protection

Objectives: This paper presents the development of a local sexual assault investigation kit (SAK) that doctors in the Philippines could use to collect biological samples from victims of sexual abuse, including child patients, that would be used for DNA testing. The study also reports on a management system via courier service to protect the integrity of the samples that could be eventually used as evidence in court from the collection site to the laboratory with sufficient backup measures. Methods: Women and Child Protection Units (WCPU) from Manila, Baguio, Cebu, and Davao partnered with the DNA Analysis Laboratory, Natural Sciences Research Institute of UP Diliman (NSRI-UPD) DNA Analysis Laboratory in testing the utility of a prototype SAK for the collection of biological samples from child patients. From January 2002 to March 2006, samples were collected from patients who went to WCPU within 72 hours post-contact and consented to participate in the study. WCPU doctors collected biological samples guided by the patient’s narratives and packaged the samples while following detailed documentation and chain of custody procedures. SAKs were then sent via a designated courier service from WCPU to the NSRI-UPD DNA Analysis Laboratory for DNA testing. The WCPU kept half of the samples collected, following recommendations made during sectoral consultations that included members of the Research Group of the Philippine Judicial Academy, prosecutors, and defense counsels. Case samples were packed well by the WCPU and received at the NSRI-UPD DNA Analysis Laboratory. Due to budget limitations, only the internal genitalia and patients’ reference buccal swabs were subjected to DNA tests as reported by Maiquilla et al.1 The remaining SAK components and case records were kept in a dedicated and secure storage facility. DNA testing reports were sent to the WCPU, which released them to the child patients and their legal guardians. Results: One hundred fifty-four female children aged 2-18 years old and their legal guardians agreed to participate in the study. Based on the initial interviews of the social workers who conducted the evaluation, all the participants came from families with very low socioeconomic status. The WCPU doctors then complied with prescribed procedures. To date, NSRI-UPD DNA Analysis Laboratory records show that a subpoena for expert testimony had been issued in only one case out of the 63 cases (1.6%) that were positive for male DNA. No further information was available on the final decision in this case due to the absence of any order from the judge granting the laboratory access to court records. Likewise, WCPUs did not have any information on the remaining 62 cases that could have used the DNA test results as evidence if a case had been filed in court. Conclusion This study is the first to report the development and validation of a sexual assault investigation kit in the Philippines aimed at helping medical doctors in collecting and preserving critical biological samples for DNA testing. Using a dedicated courier service to send SAK from collecting agencies to the laboratory for DNA testing was successfully tested and resulted in faster delivery and significantly reduced overall cost. While DNA testing remains the most powerful tool for human identification and the technology has been available in the Philippines since 1997, certain factors have prevented it from being used routinely in sexual assault investigations, including those involving children.
Women and child protection units ; Sex Offenses

Although the diagnostic information provided by radiographs may be of definite benefit to the patients, the radiographic examination does carry the potential for harm from exposure to ionizing radiation. Therefore we should try to expose radiation as low as reasonably achievable and to give diagnostic information to patients as much as possible. All of dentists should have competence in radiation protection. I wish to deal with what we should do for the optimization of radiation protection in dental clinic.
Dental Clinics* ; Dentists ; Humans ; Mental Competency ; Radiation Protection* ; Radiation, Ionizing

Among the hazards in anesthesiologic field, the radiation exposure is not uncommon and is mainly from the exposure to imaging equipment. The presented case is a very extraordinary one of radiation exposure from the patient taking radioactive iodine (I-131). Recently we experienced a radiation exposure during the emergency surgery of a thyroid cancer patient who was administered I-131 before surgery. The oral administration of I-131 is recognized as a standard medical treatment for thyroid carcinoma. But the patient treated with I-131 can be a potential radiation source of external exposure to surroundings and the radiation was actually near the recommended limit of yearly exposure in spite of short surgery time. Hereby we report the case and contemplate the peri-operative risk of radiation exposure.
Administration, Oral ; Emergencies* ; Humans ; Iodine ; Radiation Protection ; Thyroid Neoplasms