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Letters submitted pertaining to published Discussions of articles will not be printed. Discussions beyond the initial letter and response will not be published. Letters to the Editor may be published with a response from the authors of the article being discussed. They will have the best chance of acceptance if they are received within 8 weeks of an article’s publication. Letters to the Editor, discussing material recently published in the Journal, are welcome. The author has no conflict of interest to declare. To confirm the possibility of distinguishing the fat from the surrounding structures, a comparative study of histologic and magnetic resonance imaging findings should be carried out in advance, as has been done in other articles. For freehand measurements to be made, the fat has to be discernible from the surrounding structures to the naked eye.
As in other picture archiving and communications systems, the areas are measured freehand, not automatically.
The authors used the OsiriX imaging software, which is a useful picture archiving and communications system program available for Mac, to make measurements. In Figure 1 of the article, however, the authors wrote, “Volume = (A1 + A2 + A3) × H.” A = measured area, H= same height between measured areas.” It is thought the volume in the schema of Figure 1 should be calculated otherwise, for example, Volume = × H. Shen wrote that the volume between two adjacent slices can be calculated by in a truncated pyramid or a truncated cone, and by V = h (A i + A i+1)/2 in a parallel trapezium. 1 Based on the work of Shen et al., 2 which was deemed appropriate for the imaging-based assessment of body compartments such as adipose tissue, fat volumes were calculated as follows (Fig. The authors present information about the measurement of fat volumes in the second subdivision of the Methods section (Radiologic Study of Anatomical Fat Regions). 1 I read the above article with great interest and believe it would be helpful if some answers could be provided to the following queries. The following comments refer to the article “High-Resolution Magnetic Resonance Imaging of Aging Upper Face Fat Compartments,” written by Foissac et al.
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