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KMID : 0357520110340040271
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Journal of Radiological Science and Technology
2011 Volume.34 No. 4 p.271 ~ p.276
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Comparison of the Values of Bone Mineral Density Between DEXAs
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Lee In-Ja
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Abstract
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Statistical analysis was performed on the patients who took bone densitometry using Lunar and Hologic equipments for 5 months from January 1st 2010 to May 30th, 2010. Patients consisted of 50 in their 40s, 100 in 50s and 50 in 60s. In addition, the results from bone densitometry were carried out on the same subject with two equipments on the same day. In case of 200 subjects, who received the bone densitometry with two equipments, the average age was 54.5 and 54.4 years old, respectively. There was no difference. The T- score of Lunar equipment was -1.377±1.221 and that of Hologic equipment was -1.806±1.123. The T-score of Lunar equipment was measured higher than that of Hologic equipment. T-test was conducted to determine the equality of the mean of two groups with 200 patients. Since the pvalue was 0.000, the value of bone mineral density was significant in two equipments. Furthermore, the patients, who were diagnosed by Lunar, showed more ’normal’ and who were diagnosed by Hologic, showed more osteoporosis, which cartegorized by WHO, such as normal, osteopenia, and osteoporosis. Thus, compared results of bone densitometry on lumbar spine L1 - L4 of four normal people with the same equipment showed that T- score of Lunar equipment was -0.4±1.2, and T- score of Hologic equipment was -1.1±1.5. It showed the higher T- score was measured in Lunar equipment as well. Therefore, the correction factor should be considered to use, since T- scores are different between two equipments.
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KEYWORD
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bone densitometry, L1 - L4, osteopenia, osteoporosis, T- scores
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