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【Objective】 To analyze the correlation between CT attenuation value of renal papilla and occurrence and development of renal calculi. 【Methods】 The clinical data of 100 patients with calcium oxalate stones treated during Aug.2020 and Jul.2022 were retrospectively analyzed, including 60 with primary stones, and 40 with recurrent stones. The 30 healthy volunteers were enrolled in the control group. CT attenuation value of renal papilla was measured with plain scan CT, and risk factors were identified with the receiver operating characteristic (ROC) curve. The correlation of CT attenuation value and 24 h urine metabolism was analyzed. 【Results】 The CT attenuation value of renal papilla was significantly higher in the primary group [34.92 (IQR: 3.84)] and recurrent group [43.00 (IQR: 8.74)] than in the control group [32.58 (IQR: 5.21)] (P<0.05). Compared with the primary group, the recurrent group had decreased citric acid level but increased calcium level in 24 h urine (P<0.05). The citrate ion and calcium ion were correlated with the CT attenuation value (P<0.05). 【Conclusion】 Patients with high renal papilla density have a high risk of stone formation and recurrence. Increased renal papilla density is a warning signal for the development of stones. The high calcium and low citric acid in 24 h urine have certain effects on the occurrence and development of urolithiasis. Intake of calcium should be limited and citric acid should be supplemented in patients with calcium oxalate stones.
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Background:In our routine practice patient were undergone CT scan of brain as well as other laboratory investigation for various traumatic brain injury and neurological complain and its management. They visit many premises for diagnosis and investigation. If we can predict the hemoglobin level from CT brain itself, we can reduce turnaround time for patient and increase throughput of patients for hospital. Keeping this in mind we had conducted this study to see the correlation between hemoglobin level and CT attenuation value of cranial Dural sinuses.Material And Methods:A prospective observational study was performed to demonstrate association between computed tomography (CT) attenuation value (Hounsfield unit (HU)) of dural venous sinuses and hemoglobin level from unenhanced CT scan of the brain. The non-contrast CT brain of total 245 patients done during October 2017 to September 2018 at medical college attached tertiary care was observed. Two measurements of HU value were taken on two adjacent slices using 10mm2 of ROI for each site, from superior sagittal sinus (SSS) and torcular herophili (TOH). The value was averaged for superior sagittal sinus, confluence of sinus and is compared with hemoglobin of patients.Result:Mean HU VALUE in SSS of females and male had 48.47 and 51.85 respectively. Mean HU VALUE in TOH of females and male had 47.46 and 50.93 respectively. Positive and significant correlation was noted between HB and SSS average, HB and TOH Average.Conclusion:Based on our result CT attenuation value (HU) value of torcular herophili and superior sagittal sinus from unenhanced CT scan of brain can be used to predict the hemoglobin level of a person. The HU value of sinus can give insight into pathology such as anemia, polycythemia or cranial sinus thrombosis.
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Objective To investigate the diagnostic and clinical significance of computerized tomography (CT) attenuation values (hounsfield unit,HU) in hydronephrosis with infection.Methods One hundred and eighty-five cases of upper urinary tract calculi with hydronephrosis from June 2014 to June 2016 were retrospectively analyzed.There were 82 males and 103 females with a mean age of (52.3 ± 13.1)years old,ranging 18-80 years old.58 cases suffered hydronephrosis without infection,55 cases suffered acute pyelonephritis and 72 cases suffered pyonephrosis.The CT attenuation values of the renal pelvis urine in three groups were measured.Results The CT attenuation value of hydronephrosis without infection group was (5.61 ± 3.67) HU,95 ％ CI(4.64-6.57) H U.In acute pyelonephritis group,CT attenuation value was (8.35 ± 5.63) HU,95％ CI(6.83-9.87) HU.In pyonephrosis group,the CT attenuation value was (13.92 ± 6.21) HU,95％ CI (12.46-5.38) HU.The CT attenuation value of pyelonephritis compared with that of hydronephrosis without infection was significant different.(P ＜ 0.01).The CT attenuation value of the patients with pyonephrosis was significantly higher than that of patients without infection and with pyelonephritis (P ＜ 0.01).Conclusions The CT attenuation value of renal pelvis urine can predict intrarenal infection.Furthermore,The measurement of CT attenuation value has some clinical significance in preoperative evaluation of hydronephrosis with infection.