Orbital conditions and their Hounsfield unit characteristics.

IF 0.8 Q4 OPHTHALMOLOGY

Orbit-The International Journal on Orbital Disorders-Oculoplastic and Lacrimal Surgery Pub Date : 2025-10-01 Epub Date: 2025-04-24 DOI:10.1080/01676830.2025.2492819

Jonathan E Lu, Lisa Y Lin, Elana Meer, Yilin Feng, Michele Bloomer, Nailyn Rasool, Mary E Cunnane, Michael K Yoon

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引用次数: 0

Abstract

Purpose: Computed tomography (CT) uses Hounsfield units (HU) for density, which is a standardized unit of measure. This study created a HU reference guide and evaluates the use of HU for orbital lesions and normal structures.

Methods: Retrospective chart review at two academic centers identified patients with biopsy proven orbital lesions and CT imaging. Patients with normal orbital structures were included as a normative database. HU was measured.

Results: The study included 219 patients with orbital lesions and 50 control patients with a total of 341 images. Of these, 241 images were orbital lesions, with 137 non-contrast and 104 contrast. There were 50 non-contrast and 50 contrast normal scans. The orbital lesion group represented 29 distinct orbital diagnoses. Major orbital structures were distinguishable by HU, and extraocular muscles were found to be significantly different between muscles. A subset of orbital lesions had significantly different mean HU compared to normal orbital structures.

Conclusions: Analysis of Hounsfield units provides additional depth to orbital imaging that may aid in diagnostic yield and therapeutic intervention for certain lesions. This study summarizes HU data for orbital lesions as well as a normative database of orbital structures.

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轨道条件及其霍斯菲尔德单位特性。

目的：计算机断层扫描（CT）使用Hounsfield单位（HU）表示密度，这是一种标准化的测量单位。本研究创建了一个HU参考指南，并评估了HU在眼眶病变和正常结构中的应用。方法：回顾性回顾两个学术中心的病例，确定活检证实的眼窝病变和CT成像。眼眶结构正常的患者作为标准数据库。测量HU。结果：本研究纳入了219例眼眶病变患者和50例对照患者，共341张图像。其中241张为眼眶病变，137张为非对比，104张为对比。有50个非对比扫描和50个正常对比扫描。眼眶病变组有29例不同的眼眶诊断。主要眶结构可通过HU区分，眼外肌在不同肌肉间有明显差异。与正常的眼眶结构相比，一部分眼眶病变的平均HU显著不同。结论：对Hounsfield单位的分析为眼眶成像提供了额外的深度，可能有助于某些病变的诊断和治疗干预。本研究总结了眼眶病变的HU数据以及眼眶结构的规范数据库。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Orbit-The International Journal on Orbital Disorders-Oculoplastic and Lacrimal Surgery OPHTHALMOLOGY-

CiteScore

2.40

自引率

9.10%

发文量

136

期刊介绍： Orbit is the international medium covering developments and results from the variety of medical disciplines that overlap and converge in the field of orbital disorders: ophthalmology, otolaryngology, reconstructive and maxillofacial surgery, medicine and endocrinology, radiology, radiotherapy and oncology, neurology, neuroophthalmology and neurosurgery, pathology and immunology, haematology.