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System for monitoring UV radiation level in phototherapy cabins in Poland.

Narbutt J, Pawlaczyk M, Sysa-Jędrzejowska A, Krzyścin JW, Sobolewski P, Rajewska-Więch B, Lesiak A - Arch Med Sci (2014)

Bottom Line: The CCS has been used in the examination of two different types of UVP cabins routinely working in Poland.It allows precise calculation of UV doses and spatial variability of UV radiance inside the cabin, thus providing uncertainties of the doses assigned by medical staff.The CCS could potentially serve as a primary standard for monitoring various UVP cabins working in Poland.

View Article: PubMed Central - PubMed

Affiliation: Department of Dermatology, Medical University of Lodz, Lodz, Poland.

ABSTRACT

Introduction: Ultraviolet phototherapy (UVP) is widely used in dermatological practice for the treatment of various skin diseases. Numerous studies support its beneficial curing effectiveness; however, overexposure to ultraviolet radiation can cause adverse health effects, such as sunburn reaction, erythema response, cataract, skin aging, etc. For these reasons, it is of special importance to monitor performance of UVP cabins using a calibration system to evaluate the UV doses incident upon the patient.

Material and methods: A mechanized cabin control system (CCS) is proposed. It consists of radiometers with a wide and narrow field of view to estimate the body irradiation and to identify malfunctioning cabin tubes. Quality control and quality assurance procedures are developed to keep high accuracy of the calibration procedure. The CCS has been used in the examination of two different types of UVP cabins routinely working in Poland.

Results: It allows precise calculation of UV doses and spatial variability of UV radiance inside the cabin, thus providing uncertainties of the doses assigned by medical staff. The CCS could potentially serve as a primary standard for monitoring various UVP cabins working in Poland.

Conclusions: The methodology developed to quantify UV doses in UVP cabins may be easily extended to any UV radiation source.

No MeSH data available.


Related in: MedlinePlus

The irradiance time series measured in the Lodz cabin, with the narrow band UVB TL-01 working tubes, during clockwise rotations of the CCS: YES UVA-1 data (A), NVA-UVB data zoomed on a part of the clockwise rotation (B)
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Figure 0006: The irradiance time series measured in the Lodz cabin, with the narrow band UVB TL-01 working tubes, during clockwise rotations of the CCS: YES UVA-1 data (A), NVA-UVB data zoomed on a part of the clockwise rotation (B)

Mentions: After approx. 500 h of the narrow band UVB phototherapy and approx. 65 h of the broad band UVA phototherapy in LPC, there were small changes in the tube efficiency (within 10% accuracy of the irradiance measurements). Figures 6 and 7 show the time series of the measured irradiance in April, June, and November calibration sessions, for the narrow band UVB and broad band UVA tubes, respectively. Figure 6A illustrates a slight deterioration (~10%) of TL-01 tube efficiency in the 5-month period. The results shown in Figures 6B and Figure 7 were obtained during the clockwise (step 4 of Mode A) rotation of the CCS at the height corresponding to the chest level. Figures 6B shows the irradiance changes during the clockwise rotation between 360° and 180° (Figure 2 for the selected cabin sector) by the NVA-UVB meter. The irradiances by TL-09 tubes (Figure 7) decreased only slightly between April 10 and June 19 calibrations, but there was a decrease of about 10% between June 19 and November 23. The decrease in the measured irradiation may be related to tube aging that may occur abruptly after a period of stable work of the cabin tubes.


System for monitoring UV radiation level in phototherapy cabins in Poland.

Narbutt J, Pawlaczyk M, Sysa-Jędrzejowska A, Krzyścin JW, Sobolewski P, Rajewska-Więch B, Lesiak A - Arch Med Sci (2014)

The irradiance time series measured in the Lodz cabin, with the narrow band UVB TL-01 working tubes, during clockwise rotations of the CCS: YES UVA-1 data (A), NVA-UVB data zoomed on a part of the clockwise rotation (B)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4296080&req=5

Figure 0006: The irradiance time series measured in the Lodz cabin, with the narrow band UVB TL-01 working tubes, during clockwise rotations of the CCS: YES UVA-1 data (A), NVA-UVB data zoomed on a part of the clockwise rotation (B)
Mentions: After approx. 500 h of the narrow band UVB phototherapy and approx. 65 h of the broad band UVA phototherapy in LPC, there were small changes in the tube efficiency (within 10% accuracy of the irradiance measurements). Figures 6 and 7 show the time series of the measured irradiance in April, June, and November calibration sessions, for the narrow band UVB and broad band UVA tubes, respectively. Figure 6A illustrates a slight deterioration (~10%) of TL-01 tube efficiency in the 5-month period. The results shown in Figures 6B and Figure 7 were obtained during the clockwise (step 4 of Mode A) rotation of the CCS at the height corresponding to the chest level. Figures 6B shows the irradiance changes during the clockwise rotation between 360° and 180° (Figure 2 for the selected cabin sector) by the NVA-UVB meter. The irradiances by TL-09 tubes (Figure 7) decreased only slightly between April 10 and June 19 calibrations, but there was a decrease of about 10% between June 19 and November 23. The decrease in the measured irradiation may be related to tube aging that may occur abruptly after a period of stable work of the cabin tubes.

Bottom Line: The CCS has been used in the examination of two different types of UVP cabins routinely working in Poland.It allows precise calculation of UV doses and spatial variability of UV radiance inside the cabin, thus providing uncertainties of the doses assigned by medical staff.The CCS could potentially serve as a primary standard for monitoring various UVP cabins working in Poland.

View Article: PubMed Central - PubMed

Affiliation: Department of Dermatology, Medical University of Lodz, Lodz, Poland.

ABSTRACT

Introduction: Ultraviolet phototherapy (UVP) is widely used in dermatological practice for the treatment of various skin diseases. Numerous studies support its beneficial curing effectiveness; however, overexposure to ultraviolet radiation can cause adverse health effects, such as sunburn reaction, erythema response, cataract, skin aging, etc. For these reasons, it is of special importance to monitor performance of UVP cabins using a calibration system to evaluate the UV doses incident upon the patient.

Material and methods: A mechanized cabin control system (CCS) is proposed. It consists of radiometers with a wide and narrow field of view to estimate the body irradiation and to identify malfunctioning cabin tubes. Quality control and quality assurance procedures are developed to keep high accuracy of the calibration procedure. The CCS has been used in the examination of two different types of UVP cabins routinely working in Poland.

Results: It allows precise calculation of UV doses and spatial variability of UV radiance inside the cabin, thus providing uncertainties of the doses assigned by medical staff. The CCS could potentially serve as a primary standard for monitoring various UVP cabins working in Poland.

Conclusions: The methodology developed to quantify UV doses in UVP cabins may be easily extended to any UV radiation source.

No MeSH data available.


Related in: MedlinePlus