Diagnostic accuracy of single-source dual-energy computed tomography and ultrasonography for detection of lateral cervical lymph node metastases of papillary thyroid carcinoma.

Background: Dual-energy computed tomography (DECT) imaging can generate iodine-based material decomposition (MD) images and spectral HU curve. This study aimed to investigate the diagnostic accuracy of single-source dual-energy CT (DECT) and ultrasonography (US) for detecting lateral cervical lymph node metastases of papillary thyroid carcinoma (PTC).

Methods: Thirty patients with PTC were enrolled in the study and underwent DECT and US examination before thyroidectomy and cervical lymph node dissection.

Diagnostic value of single-source dual-energy spectral computed tomography for papillary thyroid microcarcinomas.

Background: Ultrasound (US) and computed tomography (CT) are common diagnostic imaging methods for detecting and diagnosing papillary thyroid microcarcinoma (PTMC). However, single-source dual-energy spectral computed tomography (spectral CT) reduces beam hardening artefacts and optimizes contrast, which may add value in detecting PTMC.

Objective: To investigate values of applying single-source dual-energy spectral CT for diagnosing PTMCs, in comparison with high frequency ultrasound and conventional polychromatic images.

Soft-tissue osteoma in the neck paravertebral space.

Osteoma is a rare, slow-growing benign neoplasm located primarily in the skeleton. Soft-tissue osteoma is exceedingly rare. We report a case of soft-tissue osteoma occurring in the neck paravertebral space in a 25-year-old man.

Post-radiation CT changes and recurrent nasopharyngeal carcinoma.

Background: Nasopharyngeal carcinoma (NPC) is endemic in Southern Asia. Radiation therapy remains the mainstay of treatment strategies for NPC. Although approximately 19% - 56% of patients develop a recurrent disease 5 years after their primary treatment, recognition of post-radiation changes and early detection of relapse are important in improving the outcome of NPC.

[Value of multi-slice helical CT in the diagnosis and differential diagnosis of thyroid lesions].

Objective: To investigate the value of multi-slice helical CT in the differentiation of benign from malignant thyroid lesions.

Methods: The multi-slice helical CT images of 72 patients with 82 thyroid lesions were prospectively studied. The CT features including the margin, density of the lesion and cervical lymph node enlargement were evaluated double-blindly.