Osteoid osteoma is characterized by an intracortical nidus with a variable amount of calcification, as well cortical thickening, sclerosis, and bone marrow edema. When these findings are present, diagnosis osteoid easily made. However, may display imaging that can be misleading, it difficult to differentiate from other conditions such infection, inflammatory noninflammatory arthritis, tumors. In addition, stress fracture, abscess, hemangioma, chondroblastoma, osteoblastoma, compensatory...

MRI Findings of Subcutaneous Epidermal Cysts: Emphasis on the Presence RuptureSung Hwan Hong1, Hye Won Chung2, Ja-Young Choi1, Young Koh1, Jung-Ah Choi1 and Heung Sik Kang1Audio Available | Share

To determine whether fat-signal-fraction (FF) map using a modified Dixon sequence could help differentiate benign from malignant bone lesions.Spine magnetic resonance images (MRIs) of 120 consecutive patients were studied by 3T MRI with standard T1 -weighted image (T1 WI) and modified-Dixon for FF measurement. There three groups: control group (n = 51) normal vertebrae; 40) focal red marrow deposition, Schmorl's nodes, compression fracture, or Modic type 1 endplate degeneration; 29) spinal...

Objective This study was undertaken to evaluate the diagnostic efficacy of additional oblique coronal magnetic resonance (MR) imaging knee for grading anterior cruciate ligament (ACL) injury. Methods We retrospectively reviewed MR images in 169 patients. The examinations included routine sequences and T2-weighted images, which oriented parallel course femoral intercondylar roof. Two independent readers evaluated status ACL by then imaging. severity injury graded using a 4-point system from...

The purpose of our study was to describe the MRI findings angioleiomyoma in soft tissue extremities.Angioleiomyoma should be considered a possible diagnosis when well-demarcated subcutaneous mass isointense signal on T1-weighted images, heterogeneous high intensity T2-weighted images with homogeneous strong enhancement, and an adjacent tortuous vascular structure is seen extremities.

Objective:The purpose of this study was to assess whether a deep learning (DL) algorithm could enable simultaneous noise reduction and edge sharpening in low-dose lumbar spine CT. Materials Methods: This retrospective included 52 patients (26 male 26 female; median age, 60.5 years) who had undergone CT-guided bone biopsy between October 2015 April 2020.Initial 100-mAs survey images 50-mAs intraprocedural were reconstructed by filtered back projection.Denoising performed using vendor-agnostic...

Abstract Objectives To measure fat mass (FM) and fat-free (FFM) in the limbs abdomen using whole-body DXA compare them with CT, emphasizing precise regional comparisons to demonstrate correlation between methods. Methods Fifty-eight healthy adults (aged 20–69) who underwent both CT were included this study. The scans entire body except head, image segmentation was employed for composition analysis. Total limb FM, FFM, segmental abdominal visceral adipose tissue (VAT) measured from CT....

PURPOSE: To examine the combined effects of monitor luminance and ambient light on observer performance for detecting abnormalities in a soft-copy interpretation digital chest radiographs. MATERIALS AND METHODS: A total 254 radiographs were displayed high-resolution cathode ray tube at three levels (25, 50, 100 foot-lamberts) under (0, 460 lux). Six radiologists reviewed each image nine modes light. The observers allowed to adjust window width level images. included nodule, pneumothorax,...

The purpose of this study was to evaluate the MRI features "MR corner sign" and determine its diagnostic usefulness in ankylosing spondylitis. We reviewed spinal MR images 52 patients with spondylitis compared these those age- sex-matched control subjects.The sign defined as a triangular sharply marginated abnormality vertebral body unassociated osteophytes or Schmorl's node. lesions were significantly more common group than (Fisher's exact test, p < 0.001). sensitivity, specificity,...

The purpose of our study was to determine the MRI findings rheumatoid arthritis (RA) and tuberculous arthritis, with emphasis on differential diagnostic features.MR images 63 joints in 62 patients clinically or pathologically proven RA (36 35 patients) (27 27 were evaluated retrospectively regard pattern degree synovial thickening, size bone erosions, rim enhancement at marrow periarticular soft-tissue edema, presence number extraarticular cystic masses. compared between by statistical...

Abstract The aim of this study was to develop a fetal cartilage-derived progenitor cell (FCPC) based cartilage gel through self-assembly for repair surgery, with clinically useful properties including adhesiveness, plasticity, and continued chondrogenic remodeling after transplantation. Characterization the gels according in vitro period resulted increased features over time. Adhesion strength were significantly higher compared alginate gel, 2-wk group showing near 20-fold (1.8 ± 0.15 kPa...

Objective: The purpose of this study was to examine the effects computed tomographic (CT) parameters on metal artifact reduction in multidetector CT (MDCT) using a quantitative 3-dimensional (3D) measurement volume. Methods: A steel-based plate and screw were implanted femora 3 porcine thigh specimens. specimens examined 16-slice MDCT with 7 different combinations acquisition that consisted kilovolt (peak) (kV[p]) effective milliampere-seconds (mAs): 120 100; 300; 500; 1000; 140 500 under...

To develop and validate deep radiomics models for the diagnosis of osteoporosis using hip radiographs.A model was developed 4924 radiographs from 4308 patients (3632 women; mean age, 62 years ± 13 [SD]) obtained between September 2009 April 2020. Ten features, 16 texture three clinical features were used to train model. T score measured with dual-energy x-ray absorptiometry as a reference standard osteoporosis. Seven that combined different types developed: (model C); T); D); TC); DC); DT);...

To compare the age distribution and characteristic MR imaging findings of ependymoma for each typical location within neuraxis.During a recent eleven-year period, images 61 patients with histologically proven ependymomas were obtained retrospectively reviewed in terms incidence, peak age, location, size, signal intensity, presence or absence cyst hemorrhage, enhancement pattern, other associated findings.Among patients, tumor was spinal 35 (57%), infrartentorial 19 (31%), supratentorial...

The purpose of this study was to optimize imaging parameters for diffusion tensor (DTI) the cervical spinal cord using a recently developed sensitivity-encoded (SENSE) technique, which can substantially reduce susceptibility artifacts.One hundred twenty sets DTIs were performed in 40 normal volunteers, SENSE-based echo-planar technique with different (b-values, numbers gradient directions, number excitations, and slice thickness) stepwise approach. In step 1, DTI b-values 500, 700, 900...

Our study was based on our hypotheses that in idiopathic acute transverse myelitis (ATM), fractional anisotropy (FA) values would be abnormal not only the T2-hyperintense lesion but also surrounding normal-appearing spinal cord and FA could related to clinical outcome.Sagittal diffusion tensor imaging (DTI) performed 10 patients with ATM (four men, six women; mean age, 45 years; age range, 20-66 years) sex- age-matched normal volunteers. measurements were made at three levels: lesion,...

To determine the diagnostic accuracy of CT arthrography and virtual arthroscopy in diagnosis anterior cruciate ligament meniscus pathology.Thirty-eight consecutive patients who underwent knee were included this study. The ages ranged from 19 to 52 years all male. Sagittal, coronal, transverse oblique coronal multiplanar reconstruction images reformatted arthrography. Virtual was performed 6 standard views using a volume rendering technique. Three radiologists analyzed MPR two orthopedic...

Our purposes were to determine whether a single application of radiofrequency energy normal bone can create coagulation necrosis reproducibly and assess the accuracy MRI at revealing extent radiofrequency-induced thermal injury.Using 200-W generator 17-gauge cooled-tip electrode, total 11 ablations performed under fluoroscopic guidance in distal femurs seven dogs. Radiofrequency was applied standard monopolar mode 100 W for 10 min. During ablation, changes impedance currents recorded. MRI,...

Objective:The purpose of this study was to evaluate the diagnostic efficacy using additional oblique coronal MRI knee for grading anterior cruciate ligament (ACL) graft injury after reconstruction surgery. Materials and Methods:We retrospectively reviewed 51 consecutive MR examinations 48 patients who underwent both ACL followup arthroscopy.The included orthogonal axial, sagittal, images T2-weighted images, which were oriented in parallel with course femoral intercondylar roof.Two...

Angiolipoma of the Posterior Mediastinum with Extension into Spinal Canal: A Case ReportAngiolipoma is a rare benign soft tissue tumor, an unusual variant lipoma, consisting fatty and vascular components located in subcutis, usually trunk extremities.We report case posterior mediastinal angiolipoma extending spinal canal showing both fat angiomatous features on CT scan.ngiolipoma tumor composed mature adipose blood vessels, mainly subcutaneous tissues extremities (1).Uncommon locations cited...

Objectives To report characteristic imaging findings of calcifying aponeurotic fibromas (CAFs) on ultrasound (US) and magnetic resonance (MRI). Methods Eight patients with CAF based our institutional pathology database from 2000 to 2019 were consecutively included. Images assessed as follows: plain radiographs for the presence soft tissue calcifications; US microlithiasis (a nonshadowing hyperechoic focus &lt;3 mm) discrete calcifications, size, location, margin, echogenicity, relationship...

A high false-negative rate has been reported for the diagnosis of ossification posterior longitudinal ligament (OPLL) using plain radiography. We investigated whether deep learning (DL) can improve diagnostic performance radiologists cervical OPLL radiographs.The training set consisted 915 radiographs from 207 patients diagnosed with OPLL. For test set, we used 200 lateral 100 and without An observer study was conducted over two reading sessions. In first session, compared DL-model six...

To assess the usefulness of various metal artifact reduction (MAR) methods in patients with hip prostheses.This retrospective study included 47 consecutive who underwent arthroplasty and dual-energy CT. Conventional polyenergetic image (CI), orthopedic-MAR (O-MAR), virtual monoenergetic (VMI, 50-200 keV) were tested for MAR. Quantitative analysis was performed seven regions around prostheses. Qualitative assessments evaluation degree artifacts presence secondary artifacts.The lowest amount...