X-Ray ?Detector with CMOS Sensor Camera Application of Calcium Denisty Measurement

Pititheerapab, Y.; Chanmalueang, T.; Rerksngaem, T.; Kitipol, C.; Pintavirooj, C.

doi:10.1109/iscit.2006.339958

Cited by 2 publications

(1 citation statement)

References 1 publication

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“…The most used scintillator is Gadolinium based phosphor-the so-called GADOX, Cadmium Tungstate, CdWO4, and Thallium doped Cesium Iodine, CsT (TI). [23] The new scintillation material includes Gadolinium based ceramic scintillator, such as Gd 2 O 2 S 2 and Y 2 O 3 Gd 2 O 3 (YGO), which are used in advanced medial CT detector. The suitability of specific application of scintillator depends upon the following characteristics:…”

Section: Indirect X-ray Detection Designmentioning

confidence: 99%

Bone Mineral Density Screening System Using CMOS-Sensor X-ray Detector

Maneerat

Visitsattapongse

Pintavirooj

2021

Sensors

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This research concerns a design and construction of a bone mineral density (BMD) and bone mineral content (BMC) measurement system based on dual energy X-ray absorptiometry (DEXA). An indirect X-ray detector is designed by optical coupling CMOS sensor with image on the intensifying screen. A dedicated microcontroller X-ray apparatus is used as an X-ray source to capture two energy level X-ray of middle phalanges bone of middle finger. The captured image is processed based on modified Beer-Lambert law to compute bone mineral density. Bone mineral content is also computed by determining the area of the phalanges bone using active contour. The designed bone mineral density (BMD) and bone mineral content (BMC) measurement system is low-cost and hence can be distributed at district hospital for screening purposes of Osteoporosis of the elderly. Compared with BMD measured from commercial model, BMD measurement of our system acquires linear relation with R2 equals 0.969. The mean square error between the normalized BMD value and that of the commercial model is 0.0000981.

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Section: Indirect X-ray Detection Designmentioning

confidence: 99%

Bone Mineral Density Screening System Using CMOS-Sensor X-ray Detector

Maneerat

Visitsattapongse

Pintavirooj

2021

Sensors

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Single x-ray transmission system for bone mineral density determination

Jiménez-Mendoza

Espinosa-Arbeláez

Giraldo-Betancur

et al. 2011

Review of Scientific Instruments

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Bones are the support of the body. They are composed of many inorganic compounds and other organic materials that all together can be used to determine the mineral density of the bones. The bone mineral density is a measure index that is widely used as an indicator of the health of the bone. A typical manner to evaluate the quality of the bone is a densitometry study; a dual x-ray absorptiometry system based study that has been widely used to assess the mineral density of some animals' bones. However, despite the success stories of utilizing these systems in many different applications, it is a very expensive method that requires frequent calibration processes to work properly. Moreover, its usage in small species applications (e.g., rodents) has not been quite demonstrated yet. Following this argument, it is suggested that there is a need for an instrument that would perform such a task in a more reliable and economical manner. Therefore, in this paper we explore the possibility to develop a new, affordable, and reliable single x-ray absorptiometry system. The method consists of utilizing a single x-ray source, an x-ray image sensor, and a computer platform that all together, as a whole, will allow us to calculate the mineral density of the bone. Utilizing an x-ray transmission theory modified through a version of the Lambert-Beer law equation, a law that expresses the relationship among the energy absorbed, the thickness, and the absorption coefficient of the sample at the x-rays wavelength to calculate the mineral density of the bone can be advantageous. Having determined the parameter equation that defines the ratio of the pixels in radiographies and the bone mineral density [measured in mass per unit of area (g/cm(2))], we demonstrated the utility of our novel methodology by calculating the mineral density of Wistar rats' femur bones.

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X-Ray ?Detector with CMOS Sensor Camera Application of Calcium Denisty Measurement

Cited by 2 publications

References 1 publication

Bone Mineral Density Screening System Using CMOS-Sensor X-ray Detector

Bone Mineral Density Screening System Using CMOS-Sensor X-ray Detector

Single x-ray transmission system for bone mineral density determination

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