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Updated: Aug 19, 2026
A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
Published on: January 19, 2024
[Feasibility of CT attenuation values in the diagnosis of anemia]
Youichi Sato1, Eito Kozawa, Shunji Tsukuda
1Department of Radiology, Saitama Medical School.
Insights
Computed tomography (CT) attenuation values correlate with hemoglobin (Hb) levels. Lower CT attenuation indicates anemia, offering a potential tool for interpreting CT scans.
Area of Science:
- Radiology
- Medical Imaging
- Hematology
Background:
- Hemoglobin (Hb) levels are critical indicators of red blood cell oxygen-carrying capacity.
- Anemia, a condition of low Hb, can affect tissue characteristics visible on medical imaging.
- Assessing Hb levels non-invasively can aid in clinical diagnosis and management.
Purpose of the Study:
- To investigate the correlation between CT attenuation values and Hb levels in patients.
- To determine if CT attenuation can serve as an indicator of anemia.
Main Methods:
- 113 CT studies were analyzed to measure CT attenuation values.
- Anemia was defined based on established Hb thresholds for males and females.
- Hb levels were visually graded and statistically compared with CT attenuation using linear regression analysis.
Main Results:
- A significant correlation (r=0.76) was observed between CT attenuation (HU) and Hb levels.
- Lower CT attenuation values were associated with anemia (low Hb).
- Higher CT attenuation values were associated with normal Hb levels, with significant differences noted (p<0.01).
Conclusions:
- CT attenuation values show a linear increase with rising Hb levels.
- CT attenuation can be a valuable, readily available adjunct for interpreting CT examinations, potentially aiding in anemia assessment.
Purpose:
To verify the possible correlation between CT attenuation value and hemoglobin (Hb).
Materials And Methods:
CT attenuation was evaluated in 113 CT studies. Anemia was defined as an Hb level less than 14 g/dl in males and less than 12 g/dl in females. Hb was compared visually by grading (Grade 1: cardiac muscle density much higher than lumen, Grade 2: cardiac muscle density higher than lumen, Grade 3: cardiac muscle density equal to lumen), and with HU of CT attenuation on unpaired t-test (p<0.01). Correlations were calculated using the linear regression method.
Results:
Hb of less than 6 g/dl was found to be Grade 1, while that over 12 g/dl was considered Grade 3 on visual grading. The attenuation numbers of subjects with anemia yielded low values, whereas those of normal subjects were higher. There were significant differences between subjects with anemia and normal subjects (p<0.01). HU versus hemoglobin showed a linear increase, with a correlation coefficient of 0.76.
Conclusions:
This simple, readily available information may provide a valuable adjunct in the interpretation of CT examinations.
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