فهرست مطالب

  • Volume:10 Issue: 1, 2013
  • تاریخ انتشار: 1391/12/15
  • تعداد عناوین: 10
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  • Solmaz Valizadeh, Nakissa Eil, Sara Ehsani, Hooman Bakhshandeh Page 1
    Background
    Considerable variations in the development stage among patients of the same chronological age have led to introduce the concept of the developmental age based on the maturation of different organs such as cervical vertebrae or teeth..
    Objectives
    The purpose of this study was to investigate the correlation between the stages of tooth calcification and the cervical vertebral maturation in Iranian females..Patients and
    Methods
    Four hundred females (age range, 8 to 14 years) participated in the study. To determine the dental maturational stage, calcification of the mandibular teeth except for third molars were rated according to the method suggested by Demirjian et al. To evaluate the stage of skeletal maturation, cervical vertebral morphologic changes were assessed on lateral cephalometric radiographs according to the method explained by Baccetti et al. Correlations between bone maturation and teeth calcification were showed by Spearman's correlation and Kendall’s tau-b coefficients. The relevant associations were investigated by ordinal logistic regression models..
    Results
    Correlations between the two stages were observed in the first and second premolars, canine and central incisors. All these correlations were significant. The association between cervical vertebral maturation and tooth calcification was greatest in the lateral incisor (odds ratio (OR) = 11, 95% confidence interval (CI): 6.6-18.3). However, considering the 95% CI for OR, no significant difference was detected among the second molar, first molar and lateral incisor..
    Conclusion
    The relationship between calcification of teeth and maturation of cervical bones was significant. Bone maturation can be predicted by using teeth calcification stages, especially in the second molar, first molar and lateral incisor.
    Keywords: Cervical Vertebrae, Radiography, Panoramic, Tooth Calcification
  • M. Lkay Koar, Lhan OtaĞ Vedat Sabancioullari, Mehmet Atalar, Hasan Tetiker, Aynur OtaĞ Mehmet Imen Page 7
    Background
    Morphometric data of the frontal lobe are important for surgical planning of lesions in the frontal lobe and its surroundings. Magnetic resonance imaging (MRI) techniques provide suitable data for this purpose..
    Objectives
    In our study, the morphometric data of mid-sagittal MRI of the frontal lobe in certain age and gender groups of children have been presented..Patients and
    Methods
    In a normal age group of 6-17-year-old participants, the length of the line passing through predetermined different points, including the frontal pole (FP), commissura anterior (AC), commissura posterior (PC), the outermost point of corpus callosum genu (AGCC), the innermost point of corpus callosum genu (IGCC), tuberculum sella (TS), AGCC and IGCC points parallel to AC-PC line and the point such line crosses at the frontal lobe surface (FCS) were measured in three age groups (6-9, 10-13 and 14-17 years) for each gender..
    Results
    The frontal lobe morphometric data were higher in males than females. Frontal lobe measurements peak at the age group of 10-13 in the male and at the age group of 6-13 in the female. In boys, the length of FP-AC increases 4.1% in the 10-13 age group compared with the 6-9-year-old group, while this increase is 2.3% in girls..
    Conclusion
    Differences in age and gender groups were determined. While the length of AGCC-IGCC increases 10.4% in adults, in children aged 6-17, the length of AC-PC is 11.5% greater than adults. These data will contribute to the preliminary assessment for developing a surgical plan in fine interventions in the frontal lobe and its surroundings in children.
    Keywords: Frontal Lobe, Child, Magnetic Resonance Imaging
  • Fatemeh Ezoddini Ardakani, Maryam Zangoie Booshehri, Seyed Hossein Saeed Banadaki, Reza Nafisi, Moghadam Page 14
    Background
    Scaphoid fractures are the most common type of carpal fractures..
    Objectives
    The aim of the study was to compare the diagnostic value of panoramic and conventional radiographs of the wrist in scaphoid fractures..Patients and
    Methods
    The panoramic and conventional radiographs of 122 patients with acute and chronic wrist trauma were studied. The radiographs were analyzed and examined by two independent radiologist observers; one physician radiologist and one maxillofacial radiologist. The final diagnosis was made by an orthopedic specialist. Kappa test was used for statistical calculations, inter- and intra-observer agreement and correlation between the two techniques..
    Results
    Wrist panoramic radiography was more accurate than conventional radiography for ruling out scaphoid fractures. There was an agreement in 85% or more of the cases. Agreement values were higher with better inter and intra observer agreement for panoramic examinations than conventional radiographic examinations..
    Conclusion
    The panoramic examination of the wrist is a useful technique for the diagnosis and follow-up of scaphoid fractures. Its use is recommended as a complement to conventional radiography in cases with inconclusive findings..
    Keywords: Scaphoid Bone, Fractures, Bone, Radiography, Wrist, Radiography, Panoramic
  • Dilhan Ilguy, Mehmet IlgÜy, Erdogan FiŞ, EkÇioglu, Semanur D., Ouml, Lekoglu Page 21
    Background
    Orientation of the stylohyoid complex (SHC) may be important for evaluation of the patient with orofacial pain or dysphagia..
    Objectives
    Our purpose was to assess the length and angulations of SHC using cone beam computed tomography (CBCT).Patients and
    Methods
    In this study, 3D images provided by CBCT of 69 patients (36 females, 33 males, age range 15-77 years) were retrospectively evaluated. All CBCT images were performed because of other indications. None of the patients had symptoms of ossified SHC. The length and the thickness of SHC ossification, the anteroposterior angle (APA) and the mediolateral angle (MLA) were measured by maxillofacial radiologists on the anteroposterior, right lateral and left lateral views of CBCT. Student’s t test, Pearson's correlation and Chi-square test tests were used for statistical analysis.
    Results
    According to the results, the mean length of SHC was 25.3 ± 11.3 mm and the mean thickness of SHC was 4.8 ± 1.8 mm in the study group. The mean APA value of SHCs was 25.6° ± 5.4° and the mean MLA value was 66.4° ± 6.7°. A positive correlation coefficient was found between age and APA (r = 0.335; P < 0.01); between thickness and APA (r = 0.448; P < 0.01) and also between length and thickness was found (r=0.236).
    Conclusion
    The size and morphology of the SHC can be easily assessed by 3D views provided by CBCT. In CBCT evaluation of the head and neck region, the radiologist should consider SHC according to these variations, which may have clinical importance.
  • Mahmood Nazarpoor, Masoud Poureisa, Mohammad Hossein Daghighi Page 27
    Background
    MRI is not able to directly measure the concentration of contrast agent. It is measured indirectly from the signal intensity (SI). It is very important to know how much contrast agent should be injected to receive a maximum SI in the region of interest (ROI)..
    Objectives
    The aim of this study was to investigate the maximum relationship between contrast concentration and signal intensity (SI) on T1-weighted images using spin echo (SE), fast spin echo (FSE) and inversion recovery (IR) sequences..
    Materials And Methods
    To assess the relationship between SI and concentration, a water-filled phantom containing vials of different concentrations of gadolinium DTPA (Gd-DTPA) (0 to 19.77 mmol/L) or a constant concentration (1.2 mmol/L) of contrast agent was used. The vials of constant concentration were used to measure coil nonuniformity. The mean SI was obtained in the ROI using T1-weighted images. All studies were carried out using a 0.3 T clinical MR scanner with a standard head coil..
    Results
    This study shows that maximum SI will appear at different ranges in different sequences. The maximum SI can be seen at concentrations of 5.95, 4.96 and 3.98mmol/L for SE, FSE and IR, respectively..
    Conclusion
    Using standard imaging parameters, each MRI sequence reaches its maximum SI in a specific contrast concentration, which is highest in SE and least in IR in a comparison between SE, FSE and IR sequences.
    Keywords: Magnetic Resonance Imaging, Relaxation, Gadolinium DTPA
  • Volkan Kahveci, Torel Ogur, Gokhan Cipe, Sevim Ozdemir, Selcuk Hazinedaroglu Page 33
    Leiomyomas are benign tumors of the soft tissue and may develop in any location where smooth muscle is present. Leiomyoma in the inferior vena cava is a rarely seen pathology, and symplastic leiomyoma is also a rare histological variant of leiomyoma. In this case, we present a rare histological variant of symplastic leiomyoma in the inferior vena cava (IVC). This is the first radiologically reported case of a symplastic leiomyoma of the IVC..
    Keywords: Leiomyoma, Vena Cava, Inferior, Ultrasonography
  • Hamed Mortazavi, Majid Eshghpour, Mahdi Niknami, Morteza Saeedi Page 37
    Fibrodysplasia ossificans progressiva (FOP) is a rare hereditary connective tissue disease characterized by the progressive ectopic ossification of ligaments, tendons, and facial and skeletal muscles throughout life. Symptoms begin in childhood as localized soft tissue swellings. Immobility and articular dysfunction appear with involvement of the spine and proximal extremities. The temporomandibular joint (TMJ) is a critical component involved in the maxillofacial region, resulting in severe limitation of masticatory function, although TMJ involvement is rare. The aim of this article is to present a 28-year-old man with dental problems and slowly progressive limitation of motion in the jaw, knees, shoulders and hips as well as neck distortion.
    Keywords: Myositis Ossificans, Ossification, Heterotopic, Complications
  • Mustafa Aras, Tunc Ones, Faysal Dane, Omid Nosheri, Sabahat Inanir, Tanju Yusuf Erdil, Halil Turgut Turoglu Page 41
    Fibrous dysplasia of the bone (FDB) is a common, developmental disorder with a benign course. FDB can be seen anywhere throughout the skeleton. It is usually asymptomatic and found incidentally on imaging studies that are performed for other purposes. Although whole body 18 F-flourodeoxyglucose PET/CT (FDG PET/CT) is widely used in tumor imaging, infections and benign pathologies like FDB may cause false positive results. Herein we report the case of a 48-year-old FDB patient with transitional cell carcinoma of the urinary bladder. Restaging FDG PET/CT showed multiple mild to moderate hypermetabolic bone lesions which were initially misinterpreted as bone metastases. In this case report, we aimed to guide physicians in evaluating bone lesions in cancer patients with FDB in the light of the literature.
    Keywords: Fibrous Dysplasia, Polyostotic, Bone, Bones, 18F, Flourodeoxyglucose, PET, CT
  • Mohammad Ghasem Mohseni, Seyed Reza Hosseini, Alborz Salavati, Shahrzad Dadgari Page 45
    Adult ureteroceles are generally known as simple ureteroceles with minimal obstructive effects 1 that can usually be managed endoscopically. Such pathology presented with acute abdominal pain and fever in a 32-year-old man with left renal agenesia, a cranial blind left ureter and left obstructed ureterocele. The retained secretions were suppurative.
    Keywords: Pelvic Region, Renal Agenesis, Ureterocele
  • Marina Pourafkari, Mishka Ghofrani, Majid Riahi Page 48
    Ureteral obstruction is relatively common after renal transplantation. A rare cause is the inguinal herniation of the transplant ureter. We report a case of late allograft renal transplant failure due to ureteral herniation as well as ureterovesical junction stenosis.
    Keywords: Ureteral Obstruction, Kidney, Hernia, Inguinal