Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi
Introduction. Computed tomography is more accurate than excretory urography in evaluation of renal stones due to its high sensitivity and temporal resolution; it permits sub-millimetric evaluation of the size and site of calculi but cannot evaluate their chemical composition. Dual-energy computed to...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Ivano-Frankivsk National Medical University
2021-09-01
|
| Series: | Galician Medical Journal |
| Subjects: | |
| Online Access: | https://ifnmujournal.com/gmj/article/view/1311 |
| _version_ | 1818438206076485632 |
|---|---|
| author | Shafqat Shabir Bhawani Majid Jehangir Mohammad Masood Sajjad Ahmad Dar Sajad Nazir Syed |
| author_facet | Shafqat Shabir Bhawani Majid Jehangir Mohammad Masood Sajjad Ahmad Dar Sajad Nazir Syed |
| author_sort | Shafqat Shabir Bhawani |
| collection | DOAJ |
| description | Introduction. Computed tomography is more accurate than excretory urography in evaluation of renal stones due to its high sensitivity and temporal resolution; it permits sub-millimetric evaluation of the size and site of calculi but cannot evaluate their chemical composition. Dual-energy computed tomography allows evaluating the chemical composition of urinary calculi using simultaneous image acquisition at two different energy levels.
The objective of the research was to determine renal stone composition using dual-energy multidetector computed tomography, and its correlation with post-extraction chemical analysis of stones.
Materials and Methods. This prospective study was conducted in the Department of Radiodiagnosis and Imaging from September 2017 to March 2019. A total of 50 patients with urolithiasis at the age of 18-70 years were included in the study. Dual-energy computed tomography ratios of various stones were noted, and preoperative composition of calculi was given based on their colour and dual-energy computed tomography ratio. These results were compared with the post-extraction chemical analysis of stones (using Fourier infrared transform spectroscopy as the standard comparative method.)
Results. The most common type of calculi in our study population was calcium oxalate stones (78%) followed by uric acid stones (12%), cystine stones (6%) and hydroxyapatite stones (4%). The dual-energy ratio of calcium oxalate, uric acid, cystine and hydroxyapatite stones ranged from 1.38-1.59, 0.94-1.08, and 1.20-1.28 and 1.52-1.57, respectively, with the mean dual-energy ratio of 1.43, 1.01, 1.25 and 1.55, respectively. Dual-energy computed tomography was found to be 100% sensitive and specific for differentiating uric acid stones from non‑uric acid stones. The sensitivity and specificity in differentiating calcium oxalate calculus from non‑calcium oxalate calculus was 97.5% and 90.9%, respectively, with 96% accuracy and kappa value of 0.883 suggesting strong agreement.
Conclusions. Dual-energy computed tomography is highly sensitive and accurate in distinguishing between various types of renal calculi. It has vital role in management as uric acid calculi are amenable to drug treatment, while most of non-uric acid calculi require surgical intervention. |
| first_indexed | 2024-12-14T17:36:53Z |
| format | Article |
| id | doaj.art-3dc210d804334499b404f129e49d8545 |
| institution | Directory Open Access Journal |
| issn | 2414-1518 |
| language | English |
| last_indexed | 2024-12-14T17:36:53Z |
| publishDate | 2021-09-01 |
| publisher | Ivano-Frankivsk National Medical University |
| record_format | Article |
| series | Galician Medical Journal |
| spelling | doaj.art-3dc210d804334499b404f129e49d85452022-12-21T22:52:58ZengIvano-Frankivsk National Medical UniversityGalician Medical Journal2414-15182021-09-01283E202134E20213410.21802/gmj.2021.3.41311Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal CalculiShafqat Shabir Bhawani0Majid Jehangir1Mohammad Masood2Sajjad Ahmad Dar3Sajad Nazir Syed4Government Medical College, Srinagar, Jammu and Kashmir, IndiaGovernment Medical College, Srinagar, Jammu and Kashmir, IndiaGovernment Medical College, Srinagar, Jammu and Kashmir, IndiaGovernment Medical College, Srinagar, Jammu and Kashmir, IndiaGovernment Medical College, Srinagar, Jammu and Kashmir, IndiaIntroduction. Computed tomography is more accurate than excretory urography in evaluation of renal stones due to its high sensitivity and temporal resolution; it permits sub-millimetric evaluation of the size and site of calculi but cannot evaluate their chemical composition. Dual-energy computed tomography allows evaluating the chemical composition of urinary calculi using simultaneous image acquisition at two different energy levels. The objective of the research was to determine renal stone composition using dual-energy multidetector computed tomography, and its correlation with post-extraction chemical analysis of stones. Materials and Methods. This prospective study was conducted in the Department of Radiodiagnosis and Imaging from September 2017 to March 2019. A total of 50 patients with urolithiasis at the age of 18-70 years were included in the study. Dual-energy computed tomography ratios of various stones were noted, and preoperative composition of calculi was given based on their colour and dual-energy computed tomography ratio. These results were compared with the post-extraction chemical analysis of stones (using Fourier infrared transform spectroscopy as the standard comparative method.) Results. The most common type of calculi in our study population was calcium oxalate stones (78%) followed by uric acid stones (12%), cystine stones (6%) and hydroxyapatite stones (4%). The dual-energy ratio of calcium oxalate, uric acid, cystine and hydroxyapatite stones ranged from 1.38-1.59, 0.94-1.08, and 1.20-1.28 and 1.52-1.57, respectively, with the mean dual-energy ratio of 1.43, 1.01, 1.25 and 1.55, respectively. Dual-energy computed tomography was found to be 100% sensitive and specific for differentiating uric acid stones from non‑uric acid stones. The sensitivity and specificity in differentiating calcium oxalate calculus from non‑calcium oxalate calculus was 97.5% and 90.9%, respectively, with 96% accuracy and kappa value of 0.883 suggesting strong agreement. Conclusions. Dual-energy computed tomography is highly sensitive and accurate in distinguishing between various types of renal calculi. It has vital role in management as uric acid calculi are amenable to drug treatment, while most of non-uric acid calculi require surgical intervention.https://ifnmujournal.com/gmj/article/view/1311dual-energy computed tomographycalculidual-energy ratiocompositionpeak kilovoltageuric acidhounsfield unit |
| spellingShingle | Shafqat Shabir Bhawani Majid Jehangir Mohammad Masood Sajjad Ahmad Dar Sajad Nazir Syed Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi Galician Medical Journal dual-energy computed tomography calculi dual-energy ratio composition peak kilovoltage uric acid hounsfield unit |
| title | Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi |
| title_full | Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi |
| title_fullStr | Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi |
| title_full_unstemmed | Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi |
| title_short | Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi |
| title_sort | dual energy multidetector computed tomography a highly accurate non invasive tool for in vivo determination of chemical composition of renal calculi |
| topic | dual-energy computed tomography calculi dual-energy ratio composition peak kilovoltage uric acid hounsfield unit |
| url | https://ifnmujournal.com/gmj/article/view/1311 |
| work_keys_str_mv | AT shafqatshabirbhawani dualenergymultidetectorcomputedtomographyahighlyaccuratenoninvasivetoolforinvivodeterminationofchemicalcompositionofrenalcalculi AT majidjehangir dualenergymultidetectorcomputedtomographyahighlyaccuratenoninvasivetoolforinvivodeterminationofchemicalcompositionofrenalcalculi AT mohammadmasood dualenergymultidetectorcomputedtomographyahighlyaccuratenoninvasivetoolforinvivodeterminationofchemicalcompositionofrenalcalculi AT sajjadahmaddar dualenergymultidetectorcomputedtomographyahighlyaccuratenoninvasivetoolforinvivodeterminationofchemicalcompositionofrenalcalculi AT sajadnazirsyed dualenergymultidetectorcomputedtomographyahighlyaccuratenoninvasivetoolforinvivodeterminationofchemicalcompositionofrenalcalculi |