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  • Radiology in Public Focus

    January 01, 2014

    Press releases were sent to the medical news media for the following articles appearing in recent issues of Radiology.

    Reviving the Dinosaur: Virtual Reconstruction and Three-dimensional Printing of a Dinosaur Vertebra

    Illustration of Plateosaurus skeleton
    (Click to enlarge) Illustration of Plateosaurus skeleton.
    (Radiology 2014;270;3:InPress)

    CT is feasible for virtually preparing a CT dataset to separate fossilized bone from its surrounding sediment matrix and produce a 3D print, new research shows.

    René Schilling, M.D., of the Universitaetsmedizin Berlin, and colleagues performed CT on an unprepared fossil from the Museum für Naturkunde, Berlin, using a 320-slice multidetector unit. Researchers used a marching cube–based method to transform the voxel CT dataset into triangle-based, editable geometry, and then performed comprehensive postprocessing to isolate the geometry of the ver­tebra from its surrounding fossilized matrix. Finally, the resulting polygon mesh describing only the vertebra was used for a physical 3D reconstruction by using a selective laser sintering machine.

    The CT examination provided enough data to assign the fossil to the genus Plateosaurus along with valuable information about the fossil—in particular the visualization of multiple fractures and the destruction of the anterior rim of the vertebral body. The 3D print may be con­sidered an accurate copy of the bone with the unprepared fossil.

    “The authors demonstrated the feasibility and potential utility of combining CT with 3D printing, providing a nondestructive method to future paleontologists,” they write.

    Percutaneous Breast Biopsy: Effect on Short-term Quality of Life

    Testing Morbidities Index (TMI) attributes
    (Click to enlarge) Testing Morbidities Index (TMI) attributes. Box plot shows distribution of responses to the seven components of diagnostic testing that make up the TMI. For each component, the patient rated her experience on a five-point scale. X = mean score for each component.
    (Radiology 2014;270;2:InPress)

    Younger patient age is a significant predictor of decreased short-term quality of life related to percutaneous breast biopsy procedures, according to new research. Tailored prebiopsy counseling may better prepare women for percutaneous biopsy proce­dures and improve their experience, researchers discovered.

    Kathryn L. Humphrey, M.D., of the Massachusetts General Hospital Institute for Technology Assessment, Boston, and colleagues recruited 188 women undergoing percuta­neous breast biopsy in an academic medical center to participate in a mixed-mode survey 2–4 days after biopsy. Patients described their biopsy experience by using the Testing Morbidities Index (TMI), a validated instrument for assessing short-term quality of life related to diagnostic testing. The scale ranged from 0 (worst pos­sible experience) to 100 (no adverse effects).

    The women ranging in age from 22 to 80 years had a mean TMI score of 82 out of 100. Patient age was the only significant independent predictor of the TMI score, which decreased by approximately three points for every decade decrease in patient age. The mean TMI score for women less than 40 years old was 76.4.

    “Tailored prebiopsy counseling may better prepare women for percutaneous biopsy procedures and improve their experience,” the authors write.

    Altered Structural Connectome in Temporal Lobe Epilepsy

    Surface representation shows the gray–white matter junction
    (Click to enlarge) Surface representation shows the gray–white matter junction of the seven modules that emerge by using the Newman spectral algorithm on an across-subject (both healthy subjects and patients with TLE) average connectivity matrix.
    (Radiology 2014;270;3:InPress)

    Temporal Lobe Epilepsy (TLE) involves altered structural connectivity in a network that reaches beyond the tempo­ral lobe, especially in the default mode network, new research shows.

    Matthew N. DeSalvo, M.D., of the Athinoula A. Martinos Center for Biomedical Imaging, Charleston, Mass., and colleagues analyzed 60 direction diffusion-tensor imaging and magnetization-prepared rapid acquisition gradient-echo (MP-RAGE) MR imaging volumes in 24 patients with left TLE and in 24 healthy control subjects. MP-RAGE volumes were segmented into 1,015 regions of interest (ROIs) spanning the entire brain.

    Patients with TLE had 22–45 percent reduced (P < .01) dis­tant connectivity in the medial orbitofrontal cortex, tem­poral cortex, posterior cingulate cortex and precuneus compared with healthy subjects. However, local connectivity, as measured by means of network efficiency, was increased by 85 percent to 270 percent (P < .01) in the medial and lateral frontal cortices, insular cortex, posterior cingulate cortex, precuneus and occipital cortex in patients with TLE compared with healthy subjects.

    “TLE involves alterations in struc­ture beyond the medial temporal lobe, especially in the DMN, that may provide a noninvasive bio­marker for diagnosis, prognosis, and therapy monitoring in patients with TLE,” the authors write.

    Media Coverage of RSNA

    In October, 397 RSNA-related news stories were tracked in the media. These stories reached an estimated 80 million people.

    Coverage included ABCNews.com, Philly.com, Edmonton Journal - Online, Auntminnie.com and Imaging Economics.

    Read coverage of RSNA in these media:

    Radiology Select to Spotlight Radiation Dose, Dose Reduction

    Next month, RSNA News will preview the next issue of Radiology Select, Volume 5: Radiation Dose and Dose Reduction, coming in February. Radiology Select is a continuing series of selected Radiology articles that highlight developments in imaging science, techniques, and clinical practice. For more information, go to RSNA.org/RadiologySelect.

    RadiologyInfo.org Patient Safety App

    RadiologyInfo.org App - Patient Safety in ImagingHave you downloaded the RadiologyInfo.org Patient Safety in Imaging app? Available for your iPhone, iPad and Android tablet, gain quick access to more than 18 videos and 30 articles that include safety topics such as:

    • Radiation dose in X-ray and CT exams
    • Airport scanners
    • Anesthesia
    • Contrast materials
    • Children and radiation safety
    • CT during pregnancy
    • fMR imaging

    Download at the App Store or Google Play.

    January Public Information Outreach Activities Focus on CT Angiography

    In January, RSNA’s 60-Second Checkup radio program focuses on the use of CT angiography (CTA) to evaluate face transplantation patients.

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