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British Journal of Radiology (2006) 79, S134-S140
© 2006 British Institute of Radiology
doi: 10.1259/bjr/96723280
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The reliability of measuring physical characteristics of spiculated masses on mammography

M P Sampat, PhD 1 G J Whitman, MD 3 T W Stephens, MD 3 L D Broemeling, PhD 4 N A Heger, PhD 5 A C Bovik, PhD 2 and M K Markey, PhD 1

Department of 1 Biomedical Engineering and 2 Electrical and Computer Engineering, The University of Texas, Austin, TX 78712, 3 Division of Diagnostic Imaging and 4 Department of Biostatistics and Applied Mathematics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, 5 Department of Biological Sciences, Cameron University, Lawton, OK 73505, USA


Figure 1
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  		Figure 1. NIH ImageJ Interface for obtaining measurements of key characteristics of spiculated masses.

 

Figure 2
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  		Figure 2. Examples of the measurements made by radiologists R1 and R2 before and after the training stage. The measurements made by R1 are shown in blue and those made by R2 are shown in green.(a) Example measurements made by the two radiologists during the training phase. (b) Example measurements made by the two radiologists during the measurement phase.

 

Figure 3
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  		Figure 3. Bland-Altman analysis for the interobserver agreement for each of the four physical characteristics that were measured by radiologists R1 and R2. The parameters measured were: (a) major axis of the spiculated masses, (b) the width of the spiculations, (c) the length of the spiculations and (d) the number of spiculations.

 

Figure 4
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  		Figure 4. Bland-Altman analysis for the intraobserver agreement for each of the four physical characteristics that were measured twice by the senior radiologist R1. The parameters measured were (a) major axis of the spiculated masses, (b) the width of the spiculations, (c) the length of the spiculations and (d) the number of spiculations.

 




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