Comparison of Lung, Lobe, and Airway Volumes between Supine and Upright Computed Tomography and Their Correlation with Pulmonary Function Test in Patients with Chronic Obstructive Pulmonary Disease

Yamada, Yoshitake; Chubachi, Shotaro; Yamada, Minoru; Yokoyama, Yoichi; Tanabe, Akiko; Matsuoka, Satoshi; Niijima, Yuki; Murata, Mitsuru; Fukunaga, Koichi; Jinzaki, Masahiro

doi:10.1159/000527067

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…In fact, with the advancement of CT technology, there have been several studies that have applied CT scans to measure lung volumes ( Konheim et al, 2016 ; Yamada et al, 2022 ). However, the AI-3D method exhibits favorable advantages.…”

Section: Discussionmentioning

confidence: 99%

A new method for evaluating lung volume: AI-3D reconstruction

Rui,

Yuhang,

Yang

et al. 2023

Front. Physiol.

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Objective: This study aims to explore the clinical application of an AI-3D reconstruction system in measuring lung volume and analyze its practical value in donor-recipient size matching in lung transplantation.Methods: The study retrospectively collected data from 75 subjects who underwent a plethysmography examination and lung CT at the First Hospital of Jilin University. General data and information related to lung function, and imaging results were collected. The correlation between actual total lung volume (aTLV), predicted total lung volume (pTLV), and artificial intelligence three-dimensional reconstruction CT lung volume (AI-3DCTVol) was analyzed for the overall, male, and female groups. The correlation coefficient and the absolute error percentage with pTLV and AI-3DCTVol were obtained.Results: In the overall, male, and female groups, there were statistical differences (p <0.05) between the pTLV formula and AI-3D reconstruction compared to the plethysmography examination value. The ICC between pTLV and aTLV for all study participants was 0.788 (95% CI: 0.515–0.893), p <0.001. Additionally, the ICC value between AI-3D reconstruction and aTLV was 0.792 (95% CI: 0.681–0.866), p <0.001. For male study participants, the ICC between pTLV and aTLV was 0.330 (95% CI: 0.032–0.617), p = 0.006. Similarly, the ICC value between AI-3D reconstruction and aTLV was 0.413 (95% CI: 0.089–0.662), p = 0.007. In the case of female research subjects, the ICC between pTLV and aTLV was 0.279 (95% CI: 0.001–0.523), p = 0.012. Further, the ICC value between AI-3D reconstruction and aTLV was 0.615 (95% CI: 0.561–0.870), p <0.001.Conclusion: The AI-3D reconstruction, as a convenient method, has significant potential for application in lung transplantation.

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Section: Discussionmentioning

confidence: 99%

A new method for evaluating lung volume: AI-3D reconstruction

Rui,

Yuhang,

Yang

et al. 2023

Front. Physiol.

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“…The patients underwent an upright CT scan (prototype TSX-401R; Canon Medical Systems, Otawara, Japan) in the sitting position and a conventional supine CT scan (Aquilion ONE; Canon Medical Systems) in the supine position in a prospectively randomized order. The upright CT scan was performed with 320 detector rows, and its performance was comparable to that of a conventional supine CT scan, as described previously [3,[11][12][13]. Both CT scans were performed under the same conditions at 120 kVp, with a noise index of 4 for a 5-mm slice thickness.…”

Section: Image Acquisitionmentioning

confidence: 99%

Upright CT-based evaluation of the effects of posture on skull-base reconstruction after endoscopic endonasal surgery

Takahara,

Mizutani,

Yamada

et al. 2024

Preprint

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Cerebrospinal fluid (CSF) leakage is a common complication associated with endoscopic endonasal skull-base surgery (EESBS). Postoperative mobilization-associated postural changes are considered to cause CSF leakage. However, no study has demonstrated a robust relationship between postural changes and CSF leakage. We used upright computed tomography (CT) to clarify the effects of postural changes on the reconstructed skull base (RSB) after EESBS. Thirty patients who underwent EESBS at our institution were prospectively included, and their upright and supine CTs were compared to measure morphological changes in the RSB. Patient clinical data were also collected from medical charts and surgical videos, and their relationships with morphological changes were assessed. In upright CTs, the RSB shifted intracranially by 0.94 (0.0–2.9) mm on average. This shift was larger in cases with lesions extending to the sphenoid sinus, dural defects, intraoperative pulsation of the RSB, and large bone windows. The direction of the change was opposite to intuitive movement driven by gravity because of reduced intracranial pressure in the sitting position. Thus, these shifts can be directly associated with postoperative CSF leakage caused by reconstruction material displacement. Skull-base reconstruction and postoperative postural management accounting for these morphological changes may be necessary for preventing CSF leakage.

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“…Lung and lobe volume measurements using CT. Lung and lobe volume measurements on CT for all 24 patients in each position were performed by a pulmonologist with 11 years of experience (S.C.) using a commercially available workstation (Synapse Vincent; Fuji Film Co., Ltd., Tokyo, Japan) 12,18,19,[24][25][26] . This workstation incorporated a lobar computer-aided diagnosis (CAD) system that was previously demonstrated to precisely measure lobar volumes 12,18,27 .…”

Section: Pftmentioning

confidence: 99%

Differences in lung and lobe volumes between supine and upright computed tomography in patients with idiopathic lung fibrosis

Chubachi

Okamori

Yamada

et al. 2022

Sci Rep

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No clinical study has compared lung or lobe volumes on computed tomography (CT) between the supine and standing positions in patients with idiopathic lung fibrosis (IPF). This study aimed to compare lung and lobe volumes between the supine and standing positions and evaluate the correlations between the supine/standing lung volumes on CT and pulmonary function in patients with IPF. Twenty-three patients with IPF underwent a pulmonary function test and both low-dose conventional (supine position) and upright CT (standing position) during inspiration breath-holds. The volumes of the total lungs and lobes were larger in the standing than in the supine position in patients with IPF (all p < 0.05). Spearman's correlation coefficients between total lung volumes on chest CT in supine/standing positions and vital capacity (VC) or forced VC (FVC) were 0.61/0.79 or 0.64/0.80, respectively. CT-based volumes on upright CT were better correlated with VC and FVC than those on supine CT. Lung and lobe volumes in the standing position may be useful biomarkers to assess disease severity or therapeutic effect in patients with IPF.

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Comparison of Lung, Lobe, and Airway Volumes between Supine and Upright Computed Tomography and Their Correlation with Pulmonary Function Test in Patients with Chronic Obstructive Pulmonary Disease

Cited by 10 publications

References 24 publications

A new method for evaluating lung volume: AI-3D reconstruction

A new method for evaluating lung volume: AI-3D reconstruction

Upright CT-based evaluation of the effects of posture on skull-base reconstruction after endoscopic endonasal surgery

Differences in lung and lobe volumes between supine and upright computed tomography in patients with idiopathic lung fibrosis

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