No abstract available.
Hand* ; Radiography*

OBJECTIVES: The aim of this study was to verify the concordance of the measurement values when the same cephalometric analysis method was used for two-dimensional (2D) cephalometric radiography and three-dimensional computed tomography (3D CT), and to identify which 3D Frankfort horizontal (FH) plane was the most concordant with FH plane used for cephalometric radiography. MATERIALS AND METHODS: Reference horizontal plane was FH plane. Palatal angle and occlusal plane angle was evaluated with FH plane. Gonial angle (GA), palatal angle, upper occlusal plane angle (UOPA), mandibular plane angle (MPA), U1 to occlusal plane angle, U1 to FH plane angle, SNA and SNB were obtained on 2D cephalmetries and reconstructed 3D CT. The values measured eight angles in 2D lateral cephalometry and reconstructed 3D CT were evaluated by intraclass correlation coefficiency (ICC). It also was evaluated to identify 3D FH plane with high degree of concordance to 2D one by studying which one in four FH planes shows the highest degree of concordance with 2D FH plane. RESULTS: ICCs of MPA (0.752), UOPA (0.745), SNA (0.798) and SNB (0.869) were high. On the other hand, ICCs of gonial angle (0.583), palatal angle (0.287), U1 to occlusal plane (0.404), U1 to FH plane (0.617) were low respectively. Additionally GA and MPA acquired from 2D were bigger than those on 3D in all 20 patients included in this study. Concordance between one UOPA from 2D and four UOPAs from 3D CT were evaluated by ICC values. Results showed no significant difference among four FH planes defined on 3D CT. CONCLUSION: FH plane that can be set on 3D CT does not have difference in concordance from FH plane on lateral cephalometry. However, it is desirable to define FH plane on 3D CT with two orbitales and one porion considering the reproduction of orbitale itself.
Cephalometry* ; Dental Occlusion ; Hand ; Humans ; Radiography ; Reproduction

PURPOSE: To compare the leakage and scattered radiation from hand-held dental X-ray unit with radiation from fixed dental X-ray unit. MATERIALS AND METHODS: For evaluation we used one hand-held dental X-ray unit and Oramatic 558 (Trophy Radiologie, France), a fixed dental X-ray unit. Doses were measured with Unfors Multi-O-Meter 512L at the right and left hand levels of X-ray tube head part for the scattered and leakage radiation when human skull DXTTR III was exposed to both dental X-ray units. And for the leakage radiation only, doses were measured at the immediately right, left, superior and posterior side of the tube head part when air was exposed. Exposure parameters of handheld dental X-ray unit were 70kVp, 3mA , 0.1 second, and of fixed X-ray unit 70kVp, 8mA, 0.45 second. RESULTS: The mean dose at the hand level when human skull DXTTR III was exposed with portable X-ray unit 6.39 micronGy, and the mean dose with fixed X-ray unit 3.03 micronGy (p<0.001). The mean dose at the immediate side of the tube head part when air was exposed with portable X-ray unit was 2.97 micronGy and with fixed X-ray unit the mean dose was 0.68 micronGy (p<0.01). CONCLUSIONS: The leakage and scattered radiation from hand-held dental radiography was greater than from fixed dental radiography.
Hand ; Head ; Humans ; Radiation Dosage ; Radiography, Dental ; Skull

PURPOSE: To compare the leakage and scattered radiation from hand-held dental X-ray unit with radiation from fixed dental X-ray unit. MATERIALS AND METHODS: For evaluation we used one hand-held dental X-ray unit and Oramatic 558 (Trophy Radiologie, France), a fixed dental X-ray unit. Doses were measured with Unfors Multi-O-Meter 512L at the right and left hand levels of X-ray tube head part for the scattered and leakage radiation when human skull DXTTR III was exposed to both dental X-ray units. And for the leakage radiation only, doses were measured at the immediately right, left, superior and posterior side of the tube head part when air was exposed. Exposure parameters of handheld dental X-ray unit were 70kVp, 3mA , 0.1 second, and of fixed X-ray unit 70kVp, 8mA, 0.45 second. RESULTS: The mean dose at the hand level when human skull DXTTR III was exposed with portable X-ray unit 6.39 micronGy, and the mean dose with fixed X-ray unit 3.03 micronGy (p<0.001). The mean dose at the immediate side of the tube head part when air was exposed with portable X-ray unit was 2.97 micronGy and with fixed X-ray unit the mean dose was 0.68 micronGy (p<0.01). CONCLUSIONS: The leakage and scattered radiation from hand-held dental radiography was greater than from fixed dental radiography.
Hand ; Head ; Humans ; Radiation Dosage ; Radiography, Dental ; Skull

OBJECTIVES: This study was aimed to investigate the methods to reduce operator's radiation dose when taking intraoral radiographs with portable dental X-ray machines. MATERIALS AND METHODS: Two kinds of portable dental X-ray machines (DX3000, Dexcowin and Rextar, Posdion) were used. Operator's radiation dose was measured with an 1,800 cc ionization chamber (RadCal Corp.) at the hand level of X-ray tubehead and at the operator's chest and waist levels with and without the backscatter shield. The operator's radiation dose at the hand level was measured with and without lead gloves and with long and short cones. RESULTS: The backscatter shield reduced operator's radiation dose at the hand level of X-ray tubehead to 23 - 32%, the lead gloves to 26 - 31%, and long cone to 48 - 52%. And the backscatter shield reduced operator's radiation dose at the operator's chest and waist levels to 0.1 - 37%. CONCLUSIONS: When portable dental X-ray systems are used, it is recommended to select X-ray machine attached with a backscatter shield and a long cone and to wear the lead gloves.
Hand ; Radiation Dosage ; Radiation Protection ; Radiography, Dental, Digital ; Thorax

BACKGROUND: Reports on the relationship between osteoporosis and osteoarthritis (OA) have tended to disagree, especially in non-weight bearing joints such as the hand joints. We aimed to investigate the relationship between bone mineral density (BMD) and hand and knee OA in a general Korean elderly population. METHODS: We evaluated femur neck BMD and the hand and knee radiographs of 143 men and 123 women over 65 years of age who participated in a population-based cohort study. The Kellgren-Lawrence criteria for grading OA were implemented, and grade 2 or higher were categorized as radiographic OA. BMD was compared according to the existence of radiographic OA in the hand and knee using analysis of covariance, and correlation analyses were performed to explore the relationship between BMD and radiographic OA grade. RESULTS: After controlling for age and body mass index, there was no significant difference in BMD between participants with and without hand OA (p = 0.717 in male and p = 0.862 in female), between those with and without knee OA (p = 0.974 in male and p = 0.563 in female), and between those with only hand OA and those with only knee OA (p = 0.920 in male and p = 0.961 in female). Furthermore, there was no significant correlation between BMD and the radiographic OA grade of the hands (p = 0.182 in male and p = 0.897 in female) and knees (p = 0.245 in male and p = 0.098 in female). CONCLUSIONS: In our cohort of the general Korean elderly population, no association was found between osteoporosis and OA, regardless of the weight bearing status of the joints.
Aged ; *Bone Density ; Female ; Femur Neck/*radiography ; Hand/*radiography ; Humans ; Male ; Osteoarthritis, Knee/complications/*radiography ; Osteoporosis/complications/*radiography ; Republic of Korea ; Sex Factors

Polyfibromatosis syndrome is a rare disease entity that is characterized by various clinical features such as palmar, plantar, and penile fibromatoses, keloid formations of the skin, and erosive arthropathy. Its precise pathophysiology or etiology remains unclear. In addition to distinctive diverse skin manifestations, patients with polyfibromatosis have been previously reported to show erosive arthropathy with significant limitation of movement at affected joints. However, the presence of erosive polyarthropathy in polyfibromatosis has not emphasized in previous cases. Here, we report a case of polyfibromatosis syndrome combined with painless massive structural destruction of hand and foot joints, and review the characteristics of erosive arthropathy in previous cases.
Adult ; Arthrography ; Diagnosis, Differential ; Fibroma/*diagnosis/pathology/radiography ; Foot Joints/pathology/radiography ; Hand Joints/pathology/*radiography ; Humans ; Magnetic Resonance Imaging ; Male ; Metacarpophalangeal Joint/pathology/radiography ; Osteolysis/*diagnosis/etiology

PURPOSE: The purpose of this study was to examine the usefulness of abdominal sonography in the diagnosis of necrotizing enterocolitis (NEC). METHODS: We reviewed the medical records of 51 neonates who were diagnosed with NEC in the neonatal intensive care unit at Yeouido St. Mary's Hospital of the Catholic University in Korea between January 2008 and December 2012. The neonates underwent abdominal ultrasonography on the day of their diagnosis and on the third day after diagnosis. Simple abdominal radiography was performed on the same day as the sonography. The neonates were diagnosed with NEC in accordance with the abdominal sonographic findings. Abdominal radiography and sonography were used to assess the NEC stages in the neonates. RESULTS: On the day of NEC diagnosis by abdominal sonography, 50 neonates were diagnosed with stage II NEC and 1 was diagnosed with stage III NEC. However, simple radiography diagnosed 49 neonates with stage I NEC, 1 with stage II NEC, and 1 with stage III NEC. On the third day after NEC diagnosis by abdominal sonography, 48 neonates were diagnosed with stage II NEC and 3 were diagnosed with stage III NEC. On the other hand, simple radiography diagnosed 26 neonates with stage I NEC, 24 with stage II NEC, and 1 with stage III NEC. CONCLUSION: Abdominal sonography can be used as a tool for accurately diagnosing NEC and treating neonates showing ambiguous symptoms during the early stages of NEC.
Diagnosis* ; Early Diagnosis ; Enterocolitis, Necrotizing* ; Hand ; Humans ; Infant, Newborn ; Intensive Care, Neonatal ; Korea ; Medical Records ; Radiography ; Radiography, Abdominal ; Ultrasonography

Femoral mononeuropathy (FMN) as an extraarticular finding of rheumatoid arthritis (RA) is a phenomenon which has not been reported previously. We report a 53-year-old female patient with RA, presenting FMN findings during the course of the disease. On examination, right quadriceps and iliopsoas muscles showed grade 3 weakness on the Medical Research Council (MRC) scale. Sensory examination revealed sensory loss in the right medial leg and thigh. Patellar tendon reflex was absent in the right side. A diagnosis of a partial right femoral neuropathy was confirmed using nerve conduction study and electromyography. The probable mechanism of FMN was thought to be vasculitis.
Arthritis, Rheumatoid/*complications/radiography ; Electromyography ; Female ; Femoral Neuropathy/complications/*diagnosis/therapy ; Hand/radiography ; Humans ; Middle Aged ; Neural Conduction

Hand and wrist tuberculosis in adults are relatively rare disease. The purpose of treatment is to minimize the limitation of motion and to relieve the pain and swelling of involved joints. The treatments consist of curettage of bone, synovectomy and arthrodesis, which were combined with chemotherapeutic agents for tuberculosis. In the period from June 1989 to Oct. 1993, we performed operative treatment in twelve cases of hand and wrist tuberculosis(hand in 3, wrist in 9). We performed curettage and synovectomy in eight cases and arthrodesis in four. The length of follow up was over one year in all cases. Patients were evaluated by clinical examination, radiography and the Robins criteria for clinical results. The results were analysed, as follows, l. Eight patients who had tenosynovitis with moderate joint destruction were treated by curettage and synovectomy, and seven patients(87.5%) of them were evaluated "good" by Robins criteria. 2. Arthrodesis was performed in four patients who had severe joint destruction, and demonstrates "good" results in 75% of cases. 3. One patient who was treated by synovectomy, complaint intermittent pain after three years postoperatively, but no active lesion was visible on the bone scanning. 4. One patient who was performed wrist arthrodesis feels discomfort during lift up heavy products due to insufficient grip power. In conclusion, the synovectomy and curettage in early diagnosed and not so much advanced hand wrist tuberculsis is more preferable, but arthrodesis is inevitable in advanced cases with profound degree of bony destruction and nonviable cartilage in operative findings, for painless and powerful joint.
Adult ; Arthrodesis ; Cartilage ; Curettage ; Follow-Up Studies ; Hand Strength ; Hand ; Humans ; Joints ; Radiography ; Rare Diseases ; Songbirds ; Tenosynovitis ; Tuberculosis ; Wrist