Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease.
BACKGROUND:In autosomal dominant polycystic kidney disease (ADPKD), total kidney volume (TKV) is regarded as an important biomarker of disease progression and different methods are available to assess kidney volume. The purpose of this study was to identify the most efficient kidney volume computati...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2017-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC5448775?pdf=render |
| _version_ | 1818295050942021632 |
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| author | Kanishka Sharma Anna Caroli Le Van Quach Katja Petzold Michela Bozzetto Andreas L Serra Giuseppe Remuzzi Andrea Remuzzi |
| author_facet | Kanishka Sharma Anna Caroli Le Van Quach Katja Petzold Michela Bozzetto Andreas L Serra Giuseppe Remuzzi Andrea Remuzzi |
| author_sort | Kanishka Sharma |
| collection | DOAJ |
| description | BACKGROUND:In autosomal dominant polycystic kidney disease (ADPKD), total kidney volume (TKV) is regarded as an important biomarker of disease progression and different methods are available to assess kidney volume. The purpose of this study was to identify the most efficient kidney volume computation method to be used in clinical studies evaluating the effectiveness of treatments on ADPKD progression. METHODS AND FINDINGS:We measured single kidney volume (SKV) on two series of MR and CT images from clinical studies on ADPKD (experimental dataset) by two independent operators (expert and beginner), twice, using all of the available methods: polyline manual tracing (reference method), free-hand manual tracing, semi-automatic tracing, Stereology, Mid-slice and Ellipsoid method. Additionally, the expert operator also measured the kidney length. We compared different methods for reproducibility, accuracy, precision, and time required. In addition, we performed a validation study to evaluate the sensitivity of these methods to detect the between-treatment group difference in TKV change over one year, using MR images from a previous clinical study. Reproducibility was higher on CT than MR for all methods, being highest for manual and semiautomatic contouring methods (planimetry). On MR, planimetry showed highest accuracy and precision, while on CT accuracy and precision of both planimetry and Stereology methods were comparable. Mid-slice and Ellipsoid method, as well as kidney length were fast but provided only a rough estimate of kidney volume. The results of the validation study indicated that planimetry and Stereology allow using an importantly lower number of patients to detect changes in kidney volume induced by drug treatment as compared to other methods. CONCLUSIONS:Planimetry should be preferred over fast and simplified methods for accurately monitoring ADPKD progression and assessing drug treatment effects. Expert operators, especially on MR images, are required for performing reliable estimation of kidney volume. The use of efficient TKV quantification methods considerably reduces the number of patients to enrol in clinical investigations, making them more feasible and significant. |
| first_indexed | 2024-12-13T03:41:29Z |
| format | Article |
| id | doaj.art-0cdb10102de84b71a657ed62b01fc023 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-13T03:41:29Z |
| publishDate | 2017-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-0cdb10102de84b71a657ed62b01fc0232022-12-22T00:00:56ZengPublic Library of Science (PLoS)PLoS ONE1932-62032017-01-01125e017848810.1371/journal.pone.0178488Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease.Kanishka SharmaAnna CaroliLe Van QuachKatja PetzoldMichela BozzettoAndreas L SerraGiuseppe RemuzziAndrea RemuzziBACKGROUND:In autosomal dominant polycystic kidney disease (ADPKD), total kidney volume (TKV) is regarded as an important biomarker of disease progression and different methods are available to assess kidney volume. The purpose of this study was to identify the most efficient kidney volume computation method to be used in clinical studies evaluating the effectiveness of treatments on ADPKD progression. METHODS AND FINDINGS:We measured single kidney volume (SKV) on two series of MR and CT images from clinical studies on ADPKD (experimental dataset) by two independent operators (expert and beginner), twice, using all of the available methods: polyline manual tracing (reference method), free-hand manual tracing, semi-automatic tracing, Stereology, Mid-slice and Ellipsoid method. Additionally, the expert operator also measured the kidney length. We compared different methods for reproducibility, accuracy, precision, and time required. In addition, we performed a validation study to evaluate the sensitivity of these methods to detect the between-treatment group difference in TKV change over one year, using MR images from a previous clinical study. Reproducibility was higher on CT than MR for all methods, being highest for manual and semiautomatic contouring methods (planimetry). On MR, planimetry showed highest accuracy and precision, while on CT accuracy and precision of both planimetry and Stereology methods were comparable. Mid-slice and Ellipsoid method, as well as kidney length were fast but provided only a rough estimate of kidney volume. The results of the validation study indicated that planimetry and Stereology allow using an importantly lower number of patients to detect changes in kidney volume induced by drug treatment as compared to other methods. CONCLUSIONS:Planimetry should be preferred over fast and simplified methods for accurately monitoring ADPKD progression and assessing drug treatment effects. Expert operators, especially on MR images, are required for performing reliable estimation of kidney volume. The use of efficient TKV quantification methods considerably reduces the number of patients to enrol in clinical investigations, making them more feasible and significant.http://europepmc.org/articles/PMC5448775?pdf=render |
| spellingShingle | Kanishka Sharma Anna Caroli Le Van Quach Katja Petzold Michela Bozzetto Andreas L Serra Giuseppe Remuzzi Andrea Remuzzi Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease. PLoS ONE |
| title | Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease. |
| title_full | Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease. |
| title_fullStr | Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease. |
| title_full_unstemmed | Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease. |
| title_short | Kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease. |
| title_sort | kidney volume measurement methods for clinical studies on autosomal dominant polycystic kidney disease |
| url | http://europepmc.org/articles/PMC5448775?pdf=render |
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