There was a correlation between the inadequate scanning parameters (CT without contrast enhancement) and the diagnostic discrepancies in cancer patients (correlation coefficient = 0.6, p < 0.05).
There were a total of 5 patients with legitimately false-negative diagnoses made based on the FAST: 3 involving inadequate scans and 2 of blunt trauma-induced small bowel perforations without hemoperitoneum.
Difficulty in making a diagnosis was found in seven (4.2%) samples, and inadequate focus or scanning in small parts of specimens was observed in 19 (11.4%) samples.
Poor compliance with the study IG and inadequate quality of scans, when major artefacts are observed affecting visual and quantitative assessment, should be identified and reported to the sites and the sponsor immediately prior to the FU scan or the next patient enrolment.
Since the flow velocity in a single capillary is slow (usually down to several tens of microns per second), the traditional phase resolved technique that analyzes the phase difference between adjacent A-lines within one B-scan was inadequate to extract this velocity.
The association with time from admission to scan may reflect inadequate patient optimisation prior to contrast administration; this hypothesis is supported by the risk factors significantly associated with AKI alone (emergency admission to ICU and pre-scan shock).
While findings of Marini et al. do not label 18F-FDG PET scanning as an inadequate tool for risk stratification in AAA, it is essential to realize that currently, a patient with a negative PET scan should not be considered as low risk for rupture.
Representative Bennie G. Thompson, a Mississippi Democrat who leads the House Homeland Security Committee, said in a telephone interview that he would hold hearings next month when Congress returns from its recess to determine whether airport screening processes were at fault, scanning equipment was inadequate, information was not shared among federal agencies, or human error was to blame.
Obesity and overlying surgical emphysema are the common reasons for technically inadequate examination causing false-negative scans.
First, while the accuracy of linear measurements on a picture archiving and communication system (PACS) is acceptable for computed tomography (CT) scans, it is inadequate for digital plain radiographs without the use of an internal calibration [ 41].
Most scanned images, however, are of inadequate size and can lead to visible seams or repetition if they are directly used for texture mapping.
