[MRI findings of parotid acinic cell carcinoma in 19 consecutive cases].

Purpose: To describe the MRI features of acinar cell carcinoma of parotid gland (AciCC) and to evaluate the diagnostic value of MR functional imaging.

Methods: A total of 269 cases of maxillofacial AciCC confirmed by surgery and pathology were analyzed. Among them, nineteen subjects with AciCC in the parotid gland underwent preoperative MRI examination (non-enhanced scan for one case, enhanced scan for 18 cases), seventeen patients underwent diffusion-weighted imaging scan, and 15 patients underwent dynamic contrast-enhanced scan.

[Shanghai municipal expert consensus on standardized prevention and control of COVID-19 during procedures of oral radiology].

The announcement of National Health Commission on January 20, 2020 (No.1 of 2020) has included novel coronavirus pneumonia into the B class infectious diseases according to the law of the People's Republic of China on the prevention and control of infectious diseases, and has been managed as A class infectious diseases. People's governments at all levels and health administration departments have been paying high attention to it.

Targeted molecular imaging of head and neck squamous cell carcinoma: a window into precision medicine.

Tumor biomarkers play important roles in tumor growth, invasion, and metastasis. Imaging of specific biomarkers will help to understand different biological activities, thereby achieving precise medicine for each head and neck squamous cell carcinoma (HNSCC) patient. Here, we describe various molecular targets and molecular imaging modalities for HNSCC imaging.

Selection and application of coils in temporomandibular joint MRI.

Objective: To compare and evaluate the signal-to-noise ratio (SNR) and the contrast-to-noise ratio (CNR) values between a 15-channel phased array head coil and 6-channel dS Flex M surface coil in the MRI of temporomandibular joint.

Methods: 300 patients were randomly assigned to two groups: 150 patients were examined by using a 15-channel phased array head coil and the other 150 patients were scanned by using a 6-channel dS Flex M surface coil. All of the data were set in the same 6 regions of interest including the temporal lobe, condyle neck, lateral pterygoid muscle, parotid gland, the adipose area and an area of the background noise）.

Histogram analysis of apparent diffusion coefficient maps in the prognosis of patients with locally advanced head and neck squamous cell carcinoma: Comparison of different region of interest selection methods.

Objective: To investigate the influence of different region of interest (ROI) selection methods on the histogram analysis of apparent diffusion coefficient (ADC) maps and to compare their performance in predicting overall survival (OS) in patients with locally advanced head and neck squamous cell carcinoma (HNSCC).

Methods: A total of 73 patients with locally advanced HNSCC who underwent pretreatment diffusion-weighted magnetic resonance imaging were included. Based on the largest slice ROI (ROI) and whole tumor ROI (ROI), ADC histogram parameters including mean ADC (ADC); median ADC (ADC); 10th, 25th, 75th, and 90th percentiles of ADC values (ADC, ADC, ADC, and ADC); kurtosis; and skewness were obtained.

[Case-based learning based on CBCT software in clinical teaching of oral and maxillofacial radiology].

Purpose: To compare the teaching result of case-based learning based on cone-beam CT (CBCT) software and traditional pantomography.

Methods: Thirty-eight interns (7-year programme) of grade 2011 from College of Stomatology, Shanghai Jiao Tong University were enrolled. The inner diameter of the nasopalatine ducts (A), the length of upper canine's pulp cavity (B), the length between root furcation of upper first molar and the maxillary sinus (C), the length between the root of lower wisdom tooth and the inferior alveolar nerve (D) were measured on pantomographic films and CBCT in the same case.

[Clinical analysis of spectrum CT imaging reducing metal artifacts of oral and maxillofacial region].

Purpose: To assess the capability of monochromatic energy images of gemstone spectral imaging(GSI) by using spectral CT in reducing metal artifacts of oral and maxillofacial region.

Methods: Spectral CT imaging was applied to 46 patients with metallic implants with GSI sequence to measure CT numbers (expressed in Hounsfield units, HU) and SD (standard deviation) numbers of the soft tissues. 11 monochromatic-image groups were obtained, ranging from 40 keV(kiloelectronvolts) to 140 keV (every 10 keV as one group).

Correction to: Solitary fibrous tumours in the extracranial head and neck region: correlation of CT and MR features with pathologic findings.

Solitary fibrous tumours (SFTs) are rare, mesenchymal neoplasms. The purpose of this study was to analyse the radiological and clinicopathological features of SFTs in the extracranial head and neck region.

Thin-section computed tomography-histopathologic comparisons of pulmonary focal interstitial fibrosis, atypical adenomatous hyperplasia, adenocarcinoma in situ, and minimally invasive adenocarcinoma with pure ground-glass opacity.

Objective: To retrospectively compare focal interstitial fibrosis (FIF), atypical adenomatous hyperplasia (AAH), adenocarcinoma in situ (AIS), and minimally invasive adenocarcinoma (MIA) with pure ground-glass opacity (GGO) using thin-section computed tomography (CT).

Materials And Methods: Sixty pathologically confirmed cases were reviewed including 7 cases of FIF, 17 of AAH, 23of AIS, and 13 of MIA. All nodules kept pure ground glass appearances before surgical resection and their last time of thin-section CT imaging data before operation were collected.

Dynamic MR imaging of temporomandibular joint: an initial assessment with fast imaging employing steady-state acquisition sequence.

Purpose: The study was aimed to determine and optimize the parameters for the MR fast imaging employing steady-state acquisition (FIESTA) sequence, which was to obtain an acceptable image to evaluate the value of the movement of the temporomandibular joint (TMJ).

Methods: In this investigation, 20 volunteers were examined to determine and optimize the parameters of the FIESTA sequence. Then, 160 TMJs from 80 patients with temporomandibular joint disorders (TMD) of clinical suspicion were consecutively performed by both static MRI and dynamic FIESTA MRI on the oblique sagittal position.

Spontaneous osteosarcoma in craniomaxillofacial fibrous dysplasia: clinical and computed tomographic features in 8 cases.

Objective: The aim of this study was to evaluate the patient demographic and computed tomography (CT) imaging findings of spontaneous osteosarcoma in craniomaxillofacial fibrous dysplasia.

Study Design: Ten cases of spontaneous osteosarcoma in craniomaxillofacial fibrous dysplasia diagnosed during 1993-2013 were reviewed. Eight cases with CT images were reviewed.

Solitary fibrous tumours in the extracranial head and neck region: correlation of CT and MR features with pathologic findings.

Purpose: Solitary fibrous tumours (SFTs) are rare, mesenchymal neoplasms. The purpose of this study was to analyse the radiological and clinicopathological features of SFTs in the extracranial head and neck region.

Materials And Methods: We retrospectively reviewed the clinical, computed tomography (CT), magnetic resonance imaging (MRI), and pathological features in 18 patients (12 men and 6 women), aged 18-75 years, with histologically proven SFTs in the extracranial head and neck region.

[Application of apparent diffusion coefficient ratio in the diagnosis of bladder cancer grading pre-operation].

Objective: To explore the value of apparent diffusion coefficient (ADC) ratio in the diagnosis of bladder cancer pre-operation by analyzing its differences among different grades of bladder cancer.

Methods: A total of 52 cases of bladder cancer were all definitely diagnosed with histological results.Routine examinations of magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) were performed preoperatively on each patient.

Assessment of dynamic contrast-enhanced magnetic resonance imaging in the differentiation of malignant from benign orbital masses.

Objective: Dynamic contrast enhanced MR imaging (DCE-MRI) allows imaging of the physiology of the microcirculation. The purpose of this study was to determine the diagnostic efficacy of time intensity curve (TIC) and DCE parameters for characterization of orbital masses.

Methods: Fifty-nine patients with untreated orbital lesions underwent DCE-MRI before surgery.

Dual-energy computed tomography angiography for evaluating the renal vascular variants.

Background: Recognizing renal vascular variants preoperatively is important in order to avoid vascular complications during surgery. This study aimed to investigate the renal vascular variants with dual-energy computed tomography (DECT) angiography to provide valuable information for surgery.

Methods: A total of 378 patients underwent DECT.

RETRACTED ARTICLE: Diagnosis of rejection after liver transplantation: use of phosphorus-31 magnetic resonance spectroscopy ((31)P-MRS).

Background: In vivo hepatic phosphorus-31 magnetic resonance spectroscopy (31)P-MRS) provides non-invasive information about phospholipid metabolism.

Aims: To delineate (31)P-MRS abnormalities in patients with chronic rejection and to characterize spectral changes by pathology.

Patients And Methods: Sixty-six liver transplant recipients (18 with chronic rejection and 48 with normal graft function) and 38 controls (23 healthy volunteers and fifteen patients with biliary duct stricture) were studied with in vivo (31)P-MRS.

The diagnostic value of dynamic contrast-enhanced MRI for thyroid tumors.

Background And Purpose: The exact place for dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in the diagnosis and management of thyroid tumors is still under debate. We performed the study to analyze and compare the parameters generated from DCE-MRI for thyroid lesions.

Materials And Methods: For each thyroid lesion, time intensity curves (TIC), time of peak enhancement (Tpeak), maximum enhancement ratio (ERmax) and maximum rise slope (Slopemax) were plotted and calculated.

Initial HRCT findings of novel influenza A (H1N1) infection.

Objectives: The aim of our study was to describe the presentation and illustrate the imaging features of chest high-resolution computed tomography (HRCT) of patients with novel influenza A (H1N1) virus infection.

Methods: Data were collected from 163 hospitalized patients between November 2009 and March 2011, who fulfilled the clinical criteria for H1N1 influenza infection and underwent HRCT examinations within 24 hours of admission.

Results: Abnormal findings were observed in 40.

Calcified cerebral cryptococcal granuloma.

The authors report a 12-mo-old girl with calcified cerebral cryptococcal granuloma. She was admitted with a 6-mo history of seizures. Laboratory examinations showed no abnormal findings.

[Study of the correlation of papillary thyroid carcinoma's invasion with Ezrin, Moesin and E-Cadherin].

Objective: To investigate the effects of Ezrin, Moesin and E-Cadherin on the invasion and metastasis of papillary thyroid carcinoma(PTC).

Methods: The 81 paraffin-embedded specimen of PTC treated in The Second Clinical College of Harbin Medical University from 2005 to 2008 were examined immunohistochemically for Ezrin, Moesin, and E-Cadherin. Normal thyroid tissues adjacent to cancer were control.