Did radiation exposure increase with chest computed tomography use among different ages during the COVID-19 pandemic? A multi-center study with 42028 chest computed tomography scans.

Purpose: To determine whether radiation exposure increased among different ages with chest computed tomography (CT) use during the coronavirus disease-2019 (COVID-19) pandemic.

Methods: Patients with chest CT scans in an 8-month period of the pandemic between March 15, 2020, and November 15, 2020, and the same period of the preceding year were included in the study. Indications of chest CT scans were obtained from the clinical notes and categorized as infectious diseases, neoplastic disorders, trauma, and other diseases.

The diagnostic value of magnetic resonance imaging-based texture analysis in differentiating enchondroma and chondrosarcoma.

Objective: To assess the diagnostic performance of MRI-based texture analysis for differentiating enchondromas and chondrosarcomas, especially on fat-suppressed proton density (FS-PD) images.

Materials And Methods: The whole tumor volumes of 23 chondrosarcomas and 24 enchondromas were manually segmented on both FS-PD and T1-weighted images. A total of 861 radiomic features were extracted.

Ancillary findings in distinguishing between anterior cruciate ligament mucoid degeneration and sprain on MRI: a practical approach.

Background: Imaging findings of both anterior cruciate ligament (ACL) sprain and mucoid degeneration overlap in some cases, which may cause errors in magnetic resonance imaging (MRI) evaluation.

Purpose: To determine the ancillary findings on MRI in distinguishing between ACL sprain and mucoid degeneration, and also to obtain a diagnostic scheme.

Material And Methods: MRI scans of 77 patients with ACL mucoid degeneration and 77 cases with ACL sprain were retrospectively evaluated to compare with regard to parameters of age, sex, side, the status of posterior cruciate ligament - medial collateral ligament - lateral collateral ligament, bone marrow edema, intraosseous cyst, subchondral sclerosis, chondromalacia, meniscus tear, effusion, and osteochondral body.

Lumbosacral transitional vertebra in the young men population with low back pain: anatomical considerations and degenerations (transitional vertebra types in the young men population with low back pain).

Introduction: To evaluate the prevalence of subtypes of congenital lumbosacral transition vertebra (LSTV) in young male populations with low back pain (LBP) and their relationship to lumbar disc and facet degeneration.

Materials And Methods: 1875 patients (male, aged; 18-40 years) with LBP were investigated retrospectively. Standard lumbar MRI protocol of sagittal, and axial T1 weighted images (WI) and T2 WI and coronal short tau inversion recovery (STIR) T2 WI were obtained.

Isolated tympanic plate fracture frequency and its relationship to mandibular trauma.

Purpose: This study evaluated the prevalence of isolated tympanic fractures and their correlation with mandibular fractures by using maxillofacial computed tomography (CT).

Materials And Methods: We retrospectively evaluated the maxillofacial CT of 1590 patients who presented to our emergency department with maxillofacial trauma between December 2010 and December 2012. Maxillofacial CT was used as the criterion standard for evaluating patients with maxillofacial fractures.

Computed tomography findings of an unusual maxillary sinus mass: brown tumor due to tertiary hyperparathyroidism.

Brown tumor is a non-neoplastic bone lesion that develops secondary to hyperparathyroidism and it is very rare in the maxillofacial region. We report the case of a 59-year-old man who presented with pain and a swelling in the left cheek. Computed tomography (CT) demonstrated an expansile and radioluscent lesion in the left maxillary sinus.

Magnetic resonance sialography findings of submandibular ducts imaging.

Purpose: We aimed to assess the problem solving capability of magnetic resonance sialography (MR sialography), a noninvasive method for imaging submandibular gland ducts and determining duct-related pathologies, by comparing diseased and healthy cases.

Materials And Methods: We conducted radiological assessment on a total of 60 submandibular glands (mean age 44.7) in 20 cases and 10 volunteers.

Carotid intima-media thickness increase in patients with habitual simple snoring and obstructive sleep apnea syndrome is associated with metabolic syndrome.

Objectives: Sleep disorders are emerging risk factors for atherosclerosis. Increased carotid intima-media thickness (CCA-IMT) is a surrogate marker of cardiovascular risk. The aim of the present study was to investigate the relationship between CCA-IMT and habitual simple snoring or obstructive sleep apnea syndrome (OSAS) and the other cardiovascular risk factors.

An unusual Hodgkin's lymphoma case presenting with upper extremity multiple masses.

Almost always, Hodgkin's lymphoma presents with lymph node involvement. Primary extranodal lymphoma is rare and mostly has a type of non-Hodgkin's lymphoma. We present an unusual presentation of a Hodgkin's lymphoma in a 33-year-old man.

Puffed-cheek computed tomography: a dynamic maneuver for imaging oral cavity tumors.

We conducted a prospective study to compare the effectiveness of conventional computed tomography (CT) and puffed-cheek CT in detecting the presence and extension of oral cavity malignant tumors. We enrolled 11 patients--5 men and 6 women, aged 32 to 85 years--who had a primary squamous cell carcinoma of the oral cavity. These tumors were located in the floor of the mouth in 4 patients, in the buccal mucosa in 4, in both the buccal mucosa and retromolar trigone in 2, and in the retromolar trigone only in 1.

Echolucency of carotid plaques and cerebrovascular events.

Objectives: To assess the relationship between carotid plaque echogenicity and degree of stenosis with acute and chronic stroke.

Methods: A retrospective study of cerebral MRI and carotid B-mode and Doppler ultrasonography in 60 patients with stroke. Plaque echogenicity was graded as echolucent (1), predominantly echolucent (2), predominantly echogenic (3), or echogenic (4).

MRI assessment of internal acoustic canal variations using 3D-FIESTA sequences.

Magnetic resonance imaging (MRI) of the internal acoustic canal is the standard diagnostic tool for a wide range of indications in patients. This study aims to investigate the vascular variations and compression of the cranial nerves (CNs) VII and VIII at the cerebellopontine angle in patients with neuro-otologic symptoms using 3D-fast imaging employing steady-state acquisition (FIESTA) MR imaging. One hundred and eighty-seven patients (374 temporal bones) were examined on a 1.

CT and MRI findings of developmental abnormalities and ectopia varieties of the thyroid gland.

Ectopic thyroid tissue may be observed anywhere from the tongue base to the lower neck. It is rarely seen in the mediastinum and abdominal cavity. Computed tomography and magnetic resonance imaging are very sensitive for detection and localization of ectopic thyroid tissue.

Posterior semicircular canal dehiscence in asymptomatic ears.

Conclusions: This study revealed that, in the adult population, the final diagnosis of this entity can only be made by combining imaging with clinical tests.

Objective: We developed the largest temporal bone multislice computed tomography (CT) scan study so far by including 410 cases to investigate the prevalence of posterior semicircular canal dehiscence in patients with symptoms unrelated to the inner ear.

Methods: A prospective study was performed in 410 consecutive adult individuals who underwent temporal bone multislice CT scan examinations.

[The importance of computed tomography examination of temporal bone in detecting tympanosclerosis].

Objectives: The aim of this study was to show detectability of tympanosclerotic plaques with computed tomography (CT) which has an important role in the evaluation of temporal bone.

Patients And Methods: Our study group included 19 tympanoplasty cases (12 females, 7 males; mean age 31 years; range 12 to 57 years) who were operated on for hearing restoration due to chronic otitis media and conductive hearing loss between January 2006 and May 2006 at the Department of Otolaryngology, Head and Neck Surgery, Izmir Atatürk Training and Research Hospital. The tympanosclerotic plaques obtained from surgical specimens were sent for pathological confirmation and temporal bone CT scans which were obtained preoperatively were reevaluated by a blinded radiologist who was dealing with head and neck radiology.

A prospective study of paranasal sinus osteomas in 1,889 cases: changing patterns of localization.

Objectives/hypothesis: We developed the largest paranasal sinus computed tomography (CT) scan study so far by including 1,889 cases to investigate the prevalence, localization, age distribution, and the secondary complications of paranasal sinus osteomas.

Study Design: Prospective study.

Methods: A prospective study was performed on 1,889 consecutive adult individuals who underwent paranasal sinus CT examinations with suspected sinus disease.

A rare cause of exophthalmos: cemento-ossifying fibroma.

Cemento-ossifying fibroma is a benign fibroosseous lesion that contains fibrous tissue and calcified tissue resembling bone, cementum or both. It is frequently seen in the mandibula and maxilla, but it may rarely affect the ethmoid sinus. In this report, we presented computed tomography findings of an ossifying fibroma of the ethmoid sinus associated with exophthalmos.

An adult choledochal cyst--the magnetic resonance cholangiopancreatography findings: report of a case.

We herein report an unusual adult patient with a congenital choledochal cyst. A 28-year-old woman presented with recurrent episodes of abdominal pain in the right upper quadrant. Abdominal ultrasonography showed fusiform dilatation of the common bile duct without any obstruction.

Cranial MR imaging with clinical correlation in preeclampsia and eclampsia.

Purpose: Our aim was to determine the distribution and nature of cranial MRI findings in preeclampsia/eclampsia, and also to correlate them with clinical and laboratory data.

Materials And Methods: MR imaging was performed in 39 patients with preeclampsia (n=30) and eclampsia (n=9), and the distribution and signal patterns of the lesions were documented. Clinical findings, blood pressures, and laboratory data were compared statistically in patients with and without MR imaging findings.

[An unusual lingual cyst lined by respiratory epithelium].

Apart from several well-established types of developmental cysts in the tongue such as dermoid cyst, lymphoepithelial cyst, and thyroglossal cyst, there are two rare lingual cysts known as lingual cyst of foregut origin and lingual alimentary cyst. In this report, a lingual cyst with a wide involvement of the tongue is presented in a nine-year-old boy with findings of ultrasonography, computed tomography, and magnetic resonance imaging. Postoperative histopathologic examination showed a lingual cyst of foregut origin lined by respiratory epithelium.

Traumatic posterior fossa hematomas.

Purpose: Posterior fossa epidural hematomas are much less common than supratentorial epidural hematomas. The incidence of posterior fossa epidural hematomas among intracranial epidural hematomas has been reported to be 4% to 7%. Seven cases of posttraumatic posterior fossa epidural hematomas diagnosed by computed tomography (CT) are reported with radiological and clinical findings.