USING TELEMEDICINE TECHNOLOGIES IN RADIOLOGY FOR LOW-DENSITY AREA

2017 ◽  
Vol 53 (1) ◽  
pp. 4-4
Author(s):  
T.S. Smal ◽  
◽  
V.D. Zavadovskaya ◽  
I.A. Deyev ◽  
◽  
...  
Keyword(s):  
Low Density ◽  
Density Area ◽  
Low Density Area

Prognostic significance of the pretreatment CT scan on time to progression for patients with malignant gliomas

1980 ◽  
Vol 52 (5) ◽  
pp. 642-647 ◽  
Author(s):  
Victor A. Levin ◽  
William F. Hoffman ◽  
David C. Heilbron ◽  
David Norman
Keyword(s):  
Ct Scan ◽  
Tumor Progression ◽  
Probability Model ◽  
Malignant Gliomas ◽  
Prognostic Significance ◽  
Low Density ◽  
Midline Shift ◽  
Time To Progression ◽  
Density Area ◽  
Low Density Area

✓ Case histories of 61 patients receiving multimodality therapy for primary malignant brain tumors were reviewed for factors visible on the computerized tomography (CT) scan that correlated with the interval of time from diagnosis and pretherapy evaluation to the time of documented tumor progression. The initial pretreatment CT scan of each patient was reviewed. Midline shift, peritumor low density (edema), the greatest diameter of tumor enhancement, and the greatest diameter of the intratumor low-density area were measured prior to radiation therapy and chemotherapy. Using a Weibull survival probability model, time to tumor progression was most satisfactorily fitted using two covariates, the volume of enhancing tumor (for instance, contrast-enhancing tumor less intratumor low density), and the presence of a peritumor low-density area. Patients who exhibited a small amount of contrast-enhancing tumor with peritumor low density tended to have a longer time to progression than patients with large contrast-enhancing tumor volume and no peritumor low density. Midline shift was not as important a variable as the extent of tumor contrast enhancement or peritumor low density.

scholarly journals 300 A evaluation of the Cine film : The trial of improvement on image quality in low density area

1995 ◽  
Vol 51 (10) ◽  
pp. 1371
Author(s):  
SATORU TAKATA ◽  
ATSUSHI ONO ◽  
KEIICHI MICHIDA ◽  
MAKOTO ISHII ◽  
MASAKI HATTORI ◽  
...  
Keyword(s):  
Image Quality ◽  
Low Density ◽  
Density Area ◽  
Cine Film ◽  
Low Density Area

Meaning and significance of low density area (LDA) of renal cell carcinoma (RCC) on computed tomography (CT).

2018 ◽  
Vol 36 (6_suppl) ◽  
pp. 628-628
Author(s):  
Keita Shibayama ◽  
Go Kimura ◽  
Tatsuro Hayashi ◽  
Jun Akatsuka ◽  
Ryoji Kimata ◽  
...  
Keyword(s):  
Prognostic Significance ◽  
Nippon Medical School ◽  
Rank Test ◽  
Low Density ◽  
Pathological Features ◽  
Hydropic Degeneration ◽  
Central Necrosis ◽  
Density Area ◽  
Group A ◽  
Low Density Area

628 Background: LDA in solid RCC on CT is often interpreted as ‘central necrosis’ in routine clinical practice. However, the details of clinicopathological (CP) features of LDA of RCC on CT and their prognostic significance have not been shown. We retrospectively investigated LDA of RCC to clarify the CP features and prognostic significance. Methods: Of 428 surgically treated patients for RCC between January 2007 and March 2017 at Nippon Medical School hospital, we found 267 cases who had dynamic CT performed before operation. Among them, we selected and analyzed 199 consecutive cases whose tumor had low density area and whose cancer status resulted in no evidence of disease after surgery. We first examined pathological features of LDA. Then, we examined the correlation between pathological features of LDA and CP parameters and prognosis. The differences of values between the three groups were examined with the Kruskal-Wallis test. Recurrence free survival (RFS) was examined with the Kaplan-Meyer curves and the log-rank test. Results: The histology of LDA was divided into two groups: central necrosis (+) or (-: NN). Central necrosis (+) group was further divided into two subgroups: with neutrophilic infiltration (NI+) and without NI (NI-). This means that, in the end, there were three groups according to microscopic findings: group A (NI+, n = 20, 10%), B (NI-, n = 55, 28%), C (NN, n = 124, 62%). The pathological features of the NN group were composed of hyaline degeneration, hydropic degeneration, fibrosis, scars, and so on. The results of the comparison between CP parameters among the three groups were as follows: C-reactive protein, WBC, platelet, and alkaline phosphatase are statistically higher, and hemoglobin, triglyceride, and albumin were statistically lower in group A. CT value was statistically lower in group A and B. Median follow-up was 35months, and 3-year RFS (group A, B, C, p value) was (49.8%, 77.9%, 94.3%, p < 0.0001). Conclusions: In RCC patients only about one-third of LDA on CT was shown to be central necrosis. Necrosis with NI was clinically most closely associated with poor prognosis. Central necrosis may be predictive from lower CT values compared to non-necrotic tissues.

scholarly journals Development of an abdominal wall abscess caused by fish bone ingestion: a case report

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Kiyomitsu Kuwahara ◽  
Yasuji Mokuno ◽  
Hideo Matsubara ◽  
Hirokazu Kaneko ◽  
Mikihiro Shamoto ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Foreign Body ◽  
Abdominal Wall ◽  
Lower Abdominal Pain ◽  
Fish Bone ◽  
Oblique Muscle ◽  
Low Density ◽  
Density Area ◽  
Abdominal Wall Abscess ◽  
Low Density Area

Abstract Background A small percentage of patients with foreign body ingestion develop complications, which have a variety of clinical presentations. Less than 1% of cases require surgical intervention. We present a patient with an abdominal wall abscess resulting from a fish bone that pierced the cecum. The patient was treated laparoscopically. Case presentation A 55-year-old Japanese man presented to our hospital with a complaint of right lower abdominal pain. A physical examination revealed tenderness, swelling, and redness at the right iliac fossa. Computed tomography showed a low-density area with rim enhancement in his right internal oblique muscle and a hyperdense 20 mm-long pointed object in the wall of the adjacent cecum. Based on the findings we suspected an abdominal wall abscess resulting from a migrating ingested fish bone. He was administered antibiotics as conservative treatment, and the abscess was not seen on subsequent computed tomography. Two months after the initial treatment, he presented with the same symptoms, and a computed tomography scan showed the foreign body in the same location as before with the same low-density area. We diagnosed the low-density area as recurrence of the abdominal wall abscess. He underwent laparoscopic surgery to remove the foreign body. His appendix, and part of his cecum and the parietal peritoneum that included the foreign body, were resected. He had an uneventful postoperative course, and at 1 year after the surgery, the abdominal wall abscess had not recurred. Conclusions An abdominal wall abscess developed in association with the migration of an ingested fish bone. We suggest that a laparoscopic surgical resection of the portion of the bowel that includes the foreign body is a useful option for selected cases.

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