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What was the purpose of the lung nodule Enhancement Study?

What was the purpose of the lung nodule Enhancement Study?

PURPOSE: To test the hypothesis that absence of statistically significant lung nodule enhancement (≤15 HU) at computed tomography (CT) is strongly predictive of benignity. MATERIALS AND METHODS: Five hundred fifty lung nodules were studied. Of these, 356 met all entrance criteria and had a diagnosis.

How big are the nodules on a CT scan?

On nonenhanced, thin-section CT scans, the nodules were solid, 5–40 mm in diameter, relatively spherical, homogeneous, and without calcification or fat. All patients were examined with 3-mm-collimation CT before and after intravenous injection of contrast material.

How does nodular fasciitis look on a CT scan?

On CT and MR imaging, nodular fasciitis is generally seen as a relatively well-defined, soft-tissue mass of superficial location (1, 14, 15). Deep-seated lesions, mostly of intramuscular type, tend to be large and have ill-defined

Why is it important to diagnose nodular lesions in liver?

Accurate characterization of the various nodular lesions that occur in the liver, particularly the cirrhotic liver, is important for appropriate patient treatment. The majority of HCCs are believed to arise as a regenerating nodule and progress to a low-grade dysplastic nodule, then to a high-grade dysplastic nodule, and eventually to an HCC.

How are nodules detected in CT and MRI?

Update on CT and MRI of Adrenal Nodules 1206 AJR:208, June 2017 characterization of adrenal nodules relies on the detection of intracytoplasmic lipid found within adrenal adenomas, which reduces their CT attenuation. In lipid-rich adenomas, atten – uation measurements will be less than 10 HU. This quantitative threshold is highly specific

What does it mean to have an enhancing nodule?

Enhancing means that there was an uptake of contrast. You usually run a general scan to look at the region of interest before contrast and then you run a scan with contrast (iodinated, gadolinium, etc). Herein, what is a nodular enhancement? It is nodular or globular and discontinuous.

How often are adrenal nodules found in CT scan?

Incidental adrenal nodules are de- tected in approximately 4–5% of patients undergoing CT examina – tions. The prevalence of adrenal incidentalomas increases with age; fewer than 0.5% of adrenal nodules are discovered in patients in their 20s compared with up to 7% in patients older than 70 years old [1–4].

PURPOSE: To test the hypothesis that absence of statistically significant lung nodule enhancement (≤15 HU) at computed tomography (CT) is strongly predictive of benignity. MATERIALS AND METHODS: Five hundred fifty lung nodules were studied. Of these, 356 met all entrance criteria and had a diagnosis.