4285HU(a) CT = 571.4285HU, X – Ray = 2.304HU(b) CT = 2.304HU, ΔX-Ray= 2.304(c) CT = 2.304HU, X – Ray = 571.4285HUThe question was posed to me in exam.This intriguing question originated from Computerized Axial Tomography topic in division Diagnostic Investigation via Imaging Techniques of Clinical Science

4285HU(a) CT = 571.4285HU, X – Ray = 2.304HU(b) CT = 2.304HU, ΔX-Ra

1.	4285HU(a) CT = 571.4285HU, X – Ray = 2.304HU(b) CT = 2.304HU, ΔX-Ray= 2.304(c) CT = 2.304HU, X – Ray = 571.4285HUThe question was posed to me in exam.This intriguing question originated from Computerized Axial Tomography topic in division Diagnostic Investigation via Imaging Techniques of Clinical Science
Answer» The correct option is (b) CT = 2.304HU, ΔX-RAY= 2.304 Easy EXPLANATION: To solve the above, For CT ΔCT = l1 – l2 = 63 – 35 = 28 HU for CT = (l1 – l2)X 1000/(l1 + l2)/2 = (63 – 35)X 1000/(63 + 35)/2 = 571.4285HU For X – Ray ΔX-Ray = Σl1 – Σl2 = 1738 – 1734 = 4 HU for X – Ray= (Σl1 – Σl2)X1000/(Σl1 + Σl2)/2 = (1738 – 1734)X1000/(1738 + 1734)/2 = 2.304HU.

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