OBJECTIVE: To evaluate the effect of high-resolution scan mode and iterative reconstruction on lung nodule 3D volumetry. METHODS: Solid nodules with various sizes (5, 8, 10 and 12 mm) were placed inside a chest phantom. CT images were obtained with various tube currents, scan modes (conventional mode, high-resolution mode) and iterative reconstructions [0, 50 and 100 % blending of adaptive statistical iterative reconstruction (ASiR) and filtered back projection]. The nodule volumes were calculated using semiautomatic software and compared with the assumed volume from the nodules. RESULTS: The mean absolute and relative percentage error improved when using iterative reconstruction especially when using the conventional scan mode; however, this effect was not significant. Significant reduction in volume overestimation was observed when using high-resolution scan mode (P = 0.011). CONCLUSION: The high-resolution mode significantly reduces the volume overestimation of 3D volumetry. Iterative reconstruction shows a reduction in volume overestimation and error margin especially with the conventional scan mode; however, this effect was not significant.
OBJECTIVE: To evaluate the effect of high-resolution scan mode and iterative reconstruction on lung nodule 3D volumetry. METHODS: Solid nodules with various sizes (5, 8, 10 and 12 mm) were placed inside a chest phantom. CT images were obtained with various tube currents, scan modes (conventional mode, high-resolution mode) and iterative reconstructions [0, 50 and 100 % blending of adaptive statistical iterative reconstruction (ASiR) and filtered back projection]. The nodule volumes were calculated using semiautomatic software and compared with the assumed volume from the nodules. RESULTS: The mean absolute and relative percentage error improved when using iterative reconstruction especially when using the conventional scan mode; however, this effect was not significant. Significant reduction in volume overestimation was observed when using high-resolution scan mode (P = 0.011). CONCLUSION: The high-resolution mode significantly reduces the volume overestimation of 3D volumetry. Iterative reconstruction shows a reduction in volume overestimation and error margin especially with the conventional scan mode; however, this effect was not significant.
Authors: Jane P Ko; Henry Rusinek; Erika L Jacobs; James S Babb; Margrit Betke; Georgeann McGuinness; David P Naidich Journal: Radiology Date: 2003-09 Impact factor: 11.105
Authors: Peter B Noël; Alexander A Fingerle; Bernhard Renger; Daniela Münzel; Ernst J Rummeny; Martin Dobritz Journal: AJR Am J Roentgenol Date: 2011-12 Impact factor: 3.959
Authors: R G Wells; M A King; P H Simkin; P F Judy; A B Brill; H C Gifford; R Licho; P H Pretorius; P B Schneider; D W Seldin Journal: J Nucl Med Date: 2000-08 Impact factor: 10.057