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Case ReportImages in Rheumatology

Soft Tissue Calcinosis Universalis Visualized with Novel 3-D Computed Tomography Cinematic Rendering

STEVEN P. ROWE, JAN FRITZ and ELLIOT K. FISHMAN
The Journal of Rheumatology May 2019, 46 (5) 539-540; DOI: https://doi.org/10.3899/jrheum.180208
STEVEN P. ROWE
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  • For correspondence: srowe8@jhmi.edu
JAN FRITZ
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ELLIOT K. FISHMAN
The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
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Calcinosis universalis describes calcific depositions in the skin and soft tissues and can occur in association with connective tissue diseases1,2. The calcifications are thought to be dystrophic, which assumes calcium deposition on the basis of tissue damage. While deposits can be visible on radiographs2, computed tomography (CT) may be helpful for the identification of involved tissue layers, monitoring of progression in patients with a large extent of calcium deposits, and evaluation of complications.

A 68-year-old woman with a history of calcinosis universalis resulting from dermatomyositis and systemic sclerosis overlap syndrome presented with right upper extremity pain and cellulitis. The patient was evaluated with contrast-enhanced CT for complications of deeper infection. While there was no evidence of such a complication, CT provided visualization of the extent of tissue calcinosis (Figure 1). Further, a new 3-D visualization technique known as cinematic rendering (CR) was used in addition to traditional 3-D CT methods (Figure 2). CR creates photorealistic 3-D images from standard clinical CT datasets through the application of a lighting model that enhances surface detail and produces shadowing effects that accentuate the relative positions of objects within the imaged volume3. The CR images showed the relationship of the calcified muscle compartments to the humerus and radius, elbow joint, and neurovascular bundle to better advantage than traditional volume rendering and maximum intensity projection 3-D techniques4,5. While determination of the ultimate utility of CR will require larger-scale comparative studies, this case highlights the potential of this new technique.

Figure 1.
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Figure 1.

(A) Sagittal, contrast-enhanced 2-dimensional CT image, and (B) volume-rendered 3-D CT image of the patient demonstrating calcinosis (red arrowheads) of the biceps brachii and brachioradialis compartments, and overlying subcutaneous soft tissues. CT: computed tomography.

Figure 2.
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Figure 2.

(A–B) Cinematic rendering CT images with varying window width and level settings show the soft tissue calcinosis (red arrowheads) to better advantage owing to photorealistic 3-D effects and shadowing. The greater depth and realism of the cinematic rendering images enhance the visibility of texture within the calcifications to greater detail than the conventional 3-D volume-rendered technique in Figure 1. CT: computed tomography.

Footnotes

  • This manuscript describes a single retrospectively chosen case and does not include material that would be part of a defined study. No institutional review board approval or written consent were necessary. Dr. Fritz reports grants, personal fees, and nonfinancial support from Siemens Healthcare USA, outside the submitted work. Dr. Fishman receives grant funding from Siemens and GE Healthcare. He is a co-founder and stockholder of HipGraphics Inc.

REFERENCES

  1. 1.↵
    1. Walsh JS,
    2. Fairley JA
    . Calcifying disorders of the skin. J Am Acad Dermatol 1995;33:693–6.
    OpenUrlCrossRefPubMed
  2. 2.↵
    1. Shahi V,
    2. Wetter DA,
    3. Howe BM,
    4. Ringler MD,
    5. Davis MD
    . Plain radiography is effective for the detection of calcinosis cutis occurring in association with autoimmune connective tissue disease. Br J Dermatol 2014;170:1073–9.
    OpenUrlCrossRefPubMed
  3. 3.↵
    1. Johnson PT,
    2. Schneider R,
    3. Lugo-Fagundo C,
    4. Johnson MB,
    5. Fishman EK
    . MDCT angiography with 3D rendering: a novel cinematic rendering algorithm for enhanced anatomic detail. AJR Am J Roentgenol 2017;209:309–12.
    OpenUrl
  4. 4.↵
    1. Rowe SP,
    2. Johnson PT,
    3. Fishman EK
    . Initial experience with cinematic rendering for chest cardiovascular imaging. Br J Radiol 2018;91:20170558.
  5. 5.↵
    1. Rowe SP,
    2. Fritz J,
    3. Fishman EK
    . CT evaluation of musculoskeletal trauma: initial experience with cinematic rendering. Emerg Radiol 2018;25:93–101.
    OpenUrl
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Soft Tissue Calcinosis Universalis Visualized with Novel 3-D Computed Tomography Cinematic Rendering
STEVEN P. ROWE, JAN FRITZ, ELLIOT K. FISHMAN
The Journal of Rheumatology May 2019, 46 (5) 539-540; DOI: 10.3899/jrheum.180208

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Soft Tissue Calcinosis Universalis Visualized with Novel 3-D Computed Tomography Cinematic Rendering
STEVEN P. ROWE, JAN FRITZ, ELLIOT K. FISHMAN
The Journal of Rheumatology May 2019, 46 (5) 539-540; DOI: 10.3899/jrheum.180208
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