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Study Syllabus for Classification of Radiographs of Pneumoconioses						Print
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										Radiograph ClassificationSubset 4 – Small and Large OpacitiesRadiograph #43 – Type t
Answer Key #43AAnswer Key #43BAnswer Key #43CAnswer Key #43D (Updated 9/28/2023)
Small irregular opacities type, t
**Radiograph #43A** presents no small parenchymal opacities, profusion 0/0.
**Radiograph #43B.** Type **t** opacities are defined as irregular opacities that are 1.5 to 3 mm wide. There are a few t opacities present in both lower zones; however, the right lower zone also presents atelectasis. The vascular pattern is intact in the left lower zone. The image presents a profusion of 0/1.
**Radiograph #43C** presents a greater concentration of **t** irregular opacities than does image #41B. Both middle and lower lung zones are involved. This image represents a profusion of 1/0. The vascular pattern is less distinct. Some readers suggested that there is a calcified right diaphragmatic plaque present. However, most readers judge it not to be present, therefore the classification sheet reflects that of a majority of the readers.
Soft tissue line on the right was not interpreted as pleural plaque. Some readers suggested possible right diaphragmatic calcification.
**Radiograph #43D.** This image presents **t/q** opacities at a profusion of 1/1 involving all lung zones bilaterally. The vascular pattern is mildly indistinct. There is bilateral pleural involvement with calcification noted. There is face on plaque, diaphragmatic plaque, and other sites on the right and left. There is only in profile plaque on the left. The symbol aa for calcifications in the aortic arch is noted. The symbol fr for rib fractures is also checked.
Radiograph #44 – Type u
Answer Key #44AAnswer Key #44D (Updated 9/28/2023)
Small irregular opacities, type u
U opacities are quite rare. Digital images of low profusion u opacities were not obtained. Please refer to the quadrant images from the 2011D standards for examples.
**Radiograph #44A.** This image presents no small parenchymal opacities, profusion 0/0. (Note images #44B and #44C were removed).
**Radiograph #44D** is of quality **2** because of scapular overlap. Small parenchymal opacities are present in both upper and middle zones as well. They are characterized as shape and size **u/r**, indicating a mixture of irregular and rounded opacities, with a profusion of 1/1. There are no large opacities or pleural findings. The right hilum is large and both hila are slightly elevated, so **di** and **hi** are checked in addition to cg, aa, and perhaps pb, suggested by a peripheral linear density in the left upper zone. The rounded opacities in the right perihilar area and at the right base were attributed to **cg**. Nipple markers and prosthetic humeral heads were noted.RADIOGRAPHS #41 AND #42Page 4 of 7RADIOGRAPH #45
							
					
							Last Reviewed:  April 26, 2023						Source: 	National Institute for Occupational Safety and Health
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        Syndicate homeStudy Syllabus for Classification of Radiographs of Pneumoconioses
Introductionplus icon
Preface
Appreciation to Contributors
Intent of the Self-study Syllbus
Getting Started
Clinical Overviewplus icon
Major Occupational Lung Diseasesplus icon
Pneumoconioses
Central Role of Diagnostic Imagingplus icon
Role of CT
Overview of Nonimaging Clinical Tools in Lung Disease Diagnosis
Appendix A
References
Pathology Overviewplus icon
Pulmonary Silicosis
Coal Workers’ Pneumoconiosis
Asbestos Pleuropulmonary Disease
Pathological-Clinical Correlations
References
Radiograph Classificationplus icon
SUBSET 1 – Radiograph Classification, #1 to #19plus icon
Introduction
Radiograph Identification
Section 1: Image Quality
Section 2: Parenchymal Abnormalities, #1 to #14
Section 3: Pleural Abnormalities, #15 to #19
Section 4: Any Other Abnormalities
Section 5
SUBSET 2 – Radiograph #20 to #27plus icon
Radiograph #20
Radiograph #21
Radiograph #22
Radiograph #23
Radiograph #24
Radiographs #25 to #27
SUBSET 3 – Radiograph #28 to #38plus icon
Radiographs #28 to #30
Radiographs #31 to #32
Radiographs #33 to #35
Radiographs #36 to #38
SUBSET 4 – Radiograph #39 to #46 (Small and Large Opacities)plus icon
Radiographs #39 to #40
Radiographs #41 to #42
Radiographs #43 to #44
Radiograph #45
Radiograph #46
SUBSET 5 – Classifications and Answer Keys, Radiographs #47 to #83
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