Gavezzoli D, Caputo P, Manelli A, Zuccon W, Faccini M, Bonandrini L
Scuola di Specializzazione in Chirurgia Toracica, Università degli Studi, Pavia, Italy.
Minerva Chir. 2002 Apr;57(2):151-6.
The present paper considers the technique of CT scan maps of pulmonary isodensity, examining lung density differences as a function of the type of disease and considering their significance for the purposes of refined, useful diagnosis in a surgical context. METHODS. The method is used to examine 3 groups of subjects selected on a clinical/anamnestic basis and a further group already admitted for surgery. For each patient we obtained 2 thoracic density scans during the phase of maximum inspiration and expiration. On each scan we constructed 50 isodensity maps, the equivalent of more than 2500 measurements: the preliminary standard was represented by 100 wide windows to produce total "illumination" of the pulmonary fields. The isodensity windows were then codified differently. Subsequently, the density scans were analysed with the technique of scalar decomposition.
The CT scan maps of lung isodensity proved useful for certain lung diseases in which early diagnosis, topographic extent of the pathology and the refined definition of the pathological picture provide important solutions as regards the indication and planning of surgical treatment and for the evaluation of the operative risk and prognosis.
We consider that the technique is rapidly performed, not complex and inexpensive and is able to supply detailed information on the lung parenchyma such as to be used not only as a routine technique but also in emergencies.
本文探讨了肺等密度CT扫描图技术，研究肺密度差异与疾病类型的关系，并考虑其在外科手术中精准、有效诊断方面的意义。
该方法用于检查根据临床/病史选择的3组受试者以及另一组已入院准备手术的患者。对于每位患者，我们在最大吸气和呼气阶段获取了2次胸部密度扫描。在每次扫描上，我们构建了50张等密度图，相当于超过2500次测量：初步标准是用100个宽窗口来实现肺野的完全“照明”。然后对等密度窗口进行不同编码。随后，用标量分解技术分析密度扫描结果。
肺等密度CT扫描图被证明对某些肺部疾病有用，在这些疾病中，早期诊断、病变的地形范围以及病理图像的精确界定为手术治疗的指征和规划、手术风险评估及预后提供了重要依据。
我们认为该技术操作迅速、不复杂且成本低廉，能够提供有关肺实质的详细信息，不仅可作为常规技术使用，还可用于紧急情况。
