Simulation of lung nodules for nodule detection studies

Journal Article · Fri Oct 31 23:00:00 EST 1980 · Invest. Radiol.; (United States)

DOI:https://doi.org/10.1097/00004424-198011000-00005· OSTI ID:5728231

Sorenson, J A; Nelson, J A; Niklason, L A; Klauber, M R

Two techniques for simulating lung nodules in nodule detection studies were evaluated. In one technique, radiographs were obtained with plastic beads placed on the surface of a chest phantom to simulate lung nodules. In the second technique, the same plastic beads were radiographed against a uniform background, and their radiographic images were then superimposed photographically onto a radiograph of the same chest phantom. Nodule detection rates determined by four different film readers were significantly different for films prepared by the two different techniques. The differences in detection rates are explained by differences in nodule contrast due to film sensitometric characteristics and scattered radiation effects. Photographic superpositioning does not mimic these effects accurately, as they affect clinical chest films. For this reason, it is suggested that nodule simulation films prepared by the photographic superpositioning technique cannot be used to predict nodule detection rates for clinical chest radiography. Other aspects of lung nodule simulation techniques also are discussed.

• OSTI ID: 5728231
• Journal Information: Invest. Radiol.; (United States), Journal Name: Invest. Radiol.; (United States) Vol. 15:6; ISSN INVRA
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
655003 -- Medical Physics-- Dosimetry
BIOMEDICAL RADIOGRAPHY
BODY
COMPARATIVE EVALUATIONS
DIAGNOSIS
DIAGNOSTIC TECHNIQUES
DISEASES
FILMS
IMAGES
LUNGS
MEDICINE
MOCKUP
MORPHOLOGICAL CHANGES
NUCLEAR MEDICINE
ORGANS
PHANTOMS
RADIOLOGY
RESPIRATORY SYSTEM
RESPIRATORY SYSTEM DISEASES
STRUCTURAL MODELS