The four slice CT method offers the possibility of detecting and documenting change in the volume of calcifications in children over time, and may be a useful crescendo in assessing the childs response to therapy

The four slice CT method offers the possibility of detecting and documenting change in the volume of calcifications in children over time, and may be a useful crescendo in assessing the childs response to therapy. == Acknowledgements == This study could not have been performed without the support of the CureJM Foundation, for which the authors are very thankful. Pearson correlation coefficient, the pairedt-test and descriptive statistics. == Results == 10 JIIM, mean age 14. 54 4. 54 years, had a duration of untreated disease of 8. 68 5. 65 months MSA status: U1RNP Z-DQMD-FMK (1), PM-Scl (1), Ro (1, 4 indeterminate), p155/140 (2), MJ (3), Mi-2 indeterminate (1), bad (3). 4/8 JDM (50%) were TNF–308 A+. Overall, the calcification volumes tended to decrease from the first to the second CT study by 0. 5 cm3(from 2 . 79 1 . 98 cm3to 2 . 29 2 . 25 cm3). The typical effective radiation dose was 0. 007 0. 002, 0. 010 0. 005, and 0. 245 mSv for the upper extremity, reduce extremity and chest, respectively (compared to a standard chest x-ray– 0. 02mSV effective dosage). == Conclusion == We conclude: 1) the limited low dose CT technique provides objective data about volume of the calcifications in JIIM; 2) Z-DQMD-FMK measuring the volume of calcifications in an extremity is associated with minimal radiation publicity; 3) This technique may be useful to evaluate the efficacy of therapies for JIIM dystrophic calcification. Keywords: Computed Tomography (CT), Calcification volume, Juvenile idiopathic inflammatory myopathy, Overlap syndrome, Calcification == Background == In children with JIIM, such as Juvenile Dermatomyositis (JDM) and Overlap Syndrome, dystrophic calcifications are a common and debilitating problem. The reported calcifications in JDM range from 71% [1] to 8% [2] with 40% most frequently cited [3]. These calcifications usually occur in children with chronic inflammation and hypoxia associated with JIIM, including JDM, Polymyositis and Overlap Syndromes as well as in patients with other rheumatic diseases such as Scleroderma [4] and Systemic Lupus Erythematosus [5, 6]. Plain radiography is effective intended for the detection of calcinosis and the categorization of morphological patterns of calcification [7]. Although radiography is recommended for the initial imaging of calcinosis, it fails to evaluate objectively the Z-DQMD-FMK volume of calcifications. Z-DQMD-FMK Case reports have used different types of SLC4A1 whole body scans (scintigraphy using Technetium methylene diphosphonate (Tc-99 m MDP) and Tc-99 m pyrophosphate and Strontium nitrate) in an attempt to identify the location from the calcifications and to provide a quantifiable assessment of their extent, as well as to develop a solution to monitor the childs therapeutic response [8]. Scintigraphic evaluation using Tc-99 m MDP can effectively delineate sites of dystrophic calcifications in JDM and it is more sensitive in detecting visceral calcifications than plain radiographs [9]. However , scintigraphy has failed to provide a quantitative estimation of the volume of the calcification. In contrast, micro CT and synchrotron x-ray diffraction studies of calcified deposit samples from four children with all the diagnosis of JDM characterized the microstructure of calcinosis, and demonstrated superb sensitivity with respect to quantitation of amount and spatial distribution of minerals in these calcifications samples [10]. These studies suggested that CT could be used to measure the calcifications occurring in the soft tissues of children with JIIM, because this method had been effective in the experimental mouse model [11]. The purpose of this pilot study was to determine the feasibility from the use of low dose, limited slice CT as an objective measure of in-situ calcification volume, over time, in patients with JIIM. == Methods == == Patient population == Approval was obtained from the Ann & Robert H. Lurie Childrens Hospital of Chicago Institutional Review Board to perform this prospective study (IRB#2008-13316). Inclusion criteria intended for study enrollment consisted of a diagnosis of JIIM and documentation of moderate to severe calcifications because determined by the assessor on clinical evaluation..