Feasibility study of the FRACTURE sequence in evaluating pediatric skull base bone lesions

Area of Science:

• Medical Imaging
• Pediatric Radiology
• Neuroimaging

Background:

• Computed tomography (CT) is commonly used for evaluating pediatric skull base lesions.
• CT involves ionizing radiation, posing risks, especially in children.
• There is a need for radiation-free imaging alternatives with comparable diagnostic capabilities.

Purpose of the Study:

• To assess the feasibility of a 3D fast field echo resembling a CT using a restricted echo-spacing (FRACTURE) sequence.
• To evaluate FRACTURE as a radiation-free alternative to CT for pediatric skull base lesions.
• To compare image quality, diagnostic accuracy, and treatment planning consistency between FRACTURE and CT.

Main Methods:

• Prospective study of 40 pediatric patients with suspected skull base lesions.
• Patients underwent both 256-slice CT and 3.0T MRI, including a 3D FRACTURE sequence.
• Image quality, bone edge sharpness (ERS), diagnostic accuracy, and treatment planning consistency were assessed and compared.

Main Results:

• FRACTURE demonstrated CT-comparable bone visualization (4.83 vs. 5.00) and significantly superior soft-tissue visualization (5.00 vs. 1.85).
• FRACTURE achieved superior bone edge sharpness (ERS: 474.20) compared to CT (413.45) and conventional MRI (226.50).
• High inter-rater agreement for diagnosis (ICC=1.0) and treatment planning consistency (Kappa=0.892) were observed.

Conclusions:

• The FRACTURE sequence provides excellent CT-like bony delineation with enhanced soft-tissue visualization and sharper bone edges.
• FRACTURE eliminates ionizing radiation exposure, making it a safer alternative for pediatric patients.
• FRACTURE is a feasible and reliable MRI sequence for diagnosing pediatric skull base lesions and aiding in preoperative treatment planning.