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Zhao S, Hayasaka T, Osakabe M, Kato N, Nakahara K, Kurachi H, Fukase M, Katayama Y, Yaegashi N, Motoyama T. Mucin Expression in Nonneoplastic and Neoplastic Glandular Epithelia of the Uterine Cervix. Int J Gynecol Pathol 2003; 22:393-7. [PMID: 14501822 DOI: 10.1097/01.pgp.0000092128.10100.17] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Although it is well known that the uterine cervix contains mucin-producing glandular epithelium, only a few studies have described the changes in mucin that accompany malignant transformation. In this study the authors evaluated the characteristics of mucin expression in the normal endocervical epithelium and mucinous and endometrioid adenocarcinomas of the uterine cervix. The normal endocervical epithelium was characterized by predominant sulfomucin and MUC1 expression in all sites and MUC5AC expression in the surface epithelium, while MUC2 was not detected at all and pyloric gland type mucin (using antibody HIK1083) was detected in less than 1% of cases. Cervical adenocarcinomas, especially mucinous adenocarcinomas, showed marked variability in mucin expression that included mucins of pyloric gland and intestinal type.
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Abstract
A case of a 58-year-old woman with ovarian carcinoid exhibiting double function is reported. She had suffered from constipation and hirsutism before surgery. Pathological examination revealed that many carcinoid tumor cells were immunohistochemically positive for peptide YY, which inhibits intestinal motility and many peripheral steroid cells. After surgery the patient recovered from constipation immediately. Although the serum level of testosterone also immediately decreased, hirsutism remained for about 2 years. These clinical manifestations are considered to be due to peptide hormone-producing tumor parenchymal cells and testosterone-producing functioning stromal cells. This is the first report of clinically manifested double-functioning ovarian carcinoid; one function is due to tumor cells themselves and another function is due to stromal cells.
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Hagiwara K, Hayasaka T, Toda N, Usui S, Kuno K. Upper bound of the expected training error of neural network regression for a Gaussian noise sequence. Neural Netw 2001; 14:1419-29. [PMID: 11771721 DOI: 10.1016/s0893-6080(01)00122-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In neural network regression problems, often referred to as additive noise models, NIC (Network Information Criterion) has been proposed as a general model selection criterion to determine the optimal network size with high generalization performance. Although NIC has been derived using asymptotic expansion, it has been pointed out that this technique cannot be applied under the assumption that a target function is in a family of assumed networks and the family is not minimal for representing the target true function, i.e. the overrealizable case, in which NIC reduces to the well-known AIC (Akaike Information Criterion) and others depending on a loss function. Because NIC is the unbiased estimator of generalization error based on training error, it is required to derive the expectations of errors for neural networks for such cases. This paper gives upper bounds of the expectations of training errors with respect to the distribution of training data, which we call the expected training error, for some types of networks under the squared error loss. In the overrealizable case, because the errors are determined by fitting properties of networks to noise components, including in data, the target set of data is taken to be a Gaussian noise sequence. For radial basis function networks and 3-layered neural networks with bell shaped activation function in the hidden layer, the expected training error is bounded above by sigma2* - 2nsigma2*logT/T, where sigma2* is the variance of noise, n is the number of basis functions or the number of hidden units and T is the number of data. Furthermore, for 3-layered neural networks with sigmoidal activation function in the hidden layer, we obtained the upper bound of sigma2* - O(log T/T) when n > 2. If the number of data is large enough, these bounds of the expected training error are smaller than sigma2* - N(n)sigma2*/T as evaluated in NIC, where N(n) is the number of all network parameters.
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Tsuruoka S, Sugimoto KI, Hayasaka T, Saito T, Fujimura A. Ranitidine clearance during hemodialysis with high-flux membrane: comparison of polysulfone and cellulose acetate hemodialyzers. Eur J Clin Pharmacol 2000; 56:581-3. [PMID: 11151748 DOI: 10.1007/s002280000191] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE To compare the effect of hemodialysis using two different types of dialyzer membranes, polysulfone (PS), a high-flux membrane, and cuprophane (CP), a conventional membrane, on blood ranitidine concentration. BACKGROUND Recent advances in hemodialyzer membranes have improved the removal of small and middle size uremic toxins, while little is known about the change of drug removal by new membranes. METHODS Eight patients with chronic renal failure who received ranitidine (150 mg/day) on a chronic basis were included. During the dialysis, blood samples were obtained from both the arterial and venous sides (before and after, respectively) of the dialyzer. RESULTS Serum concentration of ranitidine decreased more on PS [54 +/- 3% (+/- SEM) reduction after 3 h] than on CP (35 +/- 4%). The dialyzer clearance of ranitidine on PS membrane (67.2 +/- 4.4 ml/min/m2) was significantly higher than that on CP (43.1 +/- 3.8 ml/min/m2, P < 0.001). Elimination fraction (EF) of the drug during the dialysis with PS was also significantly higher than that with CP (72 +/- 2% versus 44 +/- 3%). Apparent half-life of ranitidine during dialysis with PS (2.9 +/- 0.4 h) was shorter than that with CP (5.1 +/- 0.7 h). However, the amount of ranitidine removed by a single dialysis with PS membrane was less than 20 mg. CONCLUSION Ranitidine clearance by hemodialysis is significantly higher with PS than with CP. Although additional dose adjustment may not be needed for ranitidine, the type of dialyzer membrane can affect drug elimination and should be taken into account for consideration of drug removal by hemodialysis.
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Hayasaka T, Meguro Y, Sasano Y, Takamura T. Optical properties and size distribution of aerosols derived from simultaneous measurements with lidar, a sunphotometer, and an aureolemeter. APPLIED OPTICS 1999; 38:1630-1635. [PMID: 18305782 DOI: 10.1364/ao.38.001630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A new method is proposed to derive the optical properties and size distribution of aerosol in an air column from simultaneous measurements of the backscattering coefficient, the optical thickness, and the solar aureole intensity with lidar, a sunphotometer, and an aureolemeter. Inasmuch as the backscattering properties and the optical thickness depend on both the complex refractive index and the size distribution, whereas the forward-scattering properties depend mainly on the size distribution, real and imaginary indices of refraction and size distributions of aerosol are retrieved from these measurements. The real and the imaginary parts of the complex refractive index of an aerosol at a wavelength of 500 nm during the period from November 1991 to March 1992 obtained in Tsukuba, Japan, were estimated to be 1.46-1.48 and 0.005-0.014, respectively. It is inferred from the size distribution and an optical thickness fraction of stratospheric aerosols in the total columnar aerosols that these results reflect the influences of stratospheric aerosols that originated from the Mt. Pinatubo eruption.
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Hayasaka T, Meguro Y, Sasano Y, Takamura T. Stratification and Size Distribution of Aerosols Retrieved from Simultaneous Measurements with Lidar, a SunPhotometer, and an Aureolemeter. APPLIED OPTICS 1998; 37:961-970. [PMID: 18268672 DOI: 10.1364/ao.37.000961] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Vertical profiles of backscattering coefficients, optical thicknesses, and columnar size distributions of aerosols were obtained by simultaneous measurements with lidar, a sunphotometer, and an aureolemeter in Tsukuba, Japan, from November 1991 to December 1992. Several conspicuous characteristics were found in the relationship between aerosol size distribution and stratification. In summer an accumulation mode is dominant, and aerosols were heavily loaded in the planetary boundary layer. Turbid atmospheres with an abundance of large particles are observed in the middle troposphere in the spring. In autumn and winter the troposphere is clear so that columnar aerosol size distributions reflect stratospheric aerosols. During the observation period, volcanic aerosols that are due to the Mt. Pinatubo eruption were being loaded in the stratosphere. The mode radius in the volume size distribution of the stratospheric aerosol was observed to increase from 0.45 mum in November 1991 to 0.6 mum in October 1992, and decreased after October 1992. Total aerosol loading in the stratosphere was estimated to be maximum in the spring of 1992, minimum in the autumn of 1992, and increased again after the autumn of 1992.
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Zhao F, Gong Z, Hu H, Tanaka M, Hayasaka T. Simultaneous determination of the aerosol complex index of refraction and size distribution from scattering measurements of polarized light. APPLIED OPTICS 1997; 36:7992-8001. [PMID: 18264328 DOI: 10.1364/ao.36.007992] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In this study we attempt to determine the aerosol complex index of refraction and size distribution from scattering measurements of polarized light. We illustrate that the scattering matrix elements M(2)(100 degrees ) and D(21) (150 degrees ) can be selected as an optimum set of matrix elements for determination of the complex index of refraction. We also illustrate that errors increase if we include insensitive scattering matrix elements in the determination of the complex index of refraction. A method is developed for the simultaneous determination of the complex index of refraction and the size distribution. In our method, we selected two sets of matrix elements, M (2) (100 degrees ) and D (21) (150 degrees ), for the determination of the complex index of refraction and others, which are much less sensitive to the complex index of refraction than M(2) (100 degrees ) and D(21) (150 degrees ), for the determination of the size distribution, based on their sensitivity analyses. A modified inversion library algorithm is adopted to solve the coupled system. Numerical experiments show that both the complex index of refraction and the size distribution can be determined with reasonable accuracy when we apply our method to scattering measurements of polarized light.
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Hayasaka T, Hirose Y, Itoh T. [Reactive lymphoid hyperplasia (RLH) of the gallbladder]. RYOIKIBETSU SHOKOGUN SHIRIZU 1996:326-328. [PMID: 8705492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ohkawa S, Hiramatsu K, Mori T, Hayasaka T. [MR venography using 3D-fast STIR sequence for lower extremities]. NIHON IGAKU HOSHASEN GAKKAI ZASSHI. NIPPON ACTA RADIOLOGICA 1995; 55:774-5. [PMID: 8532511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Venography of the lower extremities performed by injecting iodinated contrast material requires a complicated technique. Veins of lower-flow-speed such as varices are scarcely outlined by using the time-of-flight MR angiography technique. On the other hand, the 2D fast SE technique has proven itself unsuccessful when used with medium magnetic field MRI equipment in which a very long TR is unavailable. We obtained images of lower extremity veins by using the 3D fast STIR technique and medium magnetic field MRI equipment of 0.5 Tesla. The results were crisp angiographic images of lower-flow-speed veins including varices.
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Takamura T, Sasano Y, Hayasaka T. Tropospheric aerosol optical properties derived from lidar, sun photometer, and optical particle counter measurements. APPLIED OPTICS 1994; 33:7132-7140. [PMID: 20941266 DOI: 10.1364/ao.33.007132] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Tropospheric aerosols have been observed for the period from November 1990 to April 1992 with a lidar, a sun photometer, and an optical particle counter. Variations of aerosol optical thickness derived from the lidar and the sun photometer data and measurements are presented. The simultaneous measurements of these instruments also allowed us to estimate the extinction-to-backscatter ratio (S(1)), which ranged from 20 to 70. Comparison of optical thicknesses derived from both instruments clearly shows the effect of Mt. Pinatubo's eruption and the temporal variation of optical thickness in the stratosphere over 12 km. The possible range of the complex refractive index for the columnar mean aerosols can be deduced from the probable range of S(1) derived by the use of an S(1) diagram as a function of complex refractive index (m). The imaginary part of m can be estimated provided that the real part of m is known.
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Fujita N, Noda Y, Kobayashi G, Kimura K, Watanabe H, Shirane A, Hayasaka T, Mochizuki F, Yamazaki T. Gallstone ileus treated by electrohydraulic lithotripsy. Gastrointest Endosc 1992; 38:617-9. [PMID: 1397927 DOI: 10.1016/s0016-5107(92)70535-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Hayasaka T, Sasaki H, Sugawara T, Yasuura S, Kawamura T. Serum interleukin-2 receptor and interferon-alpha levels in a patient with allergic granulomatous angiitis (Churg-Strauss). Intern Med 1992; 31:955-9. [PMID: 1450510 DOI: 10.2169/internalmedicine.31.955] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A patient with allergic granulomatous angiitis accompanied by increases in serum interleukin-2 receptor (IL-2R) and interferon-alpha (IFN-alpha) levels is reported. Laboratory findings revealed leukocytosis with eosinophilia and increased serum IgE and IgG. The serum IL-2R and IFN-alpha were increased. The serum immune complex, interferon-beta, -gamma and complements remained at normal levels. The serum IgE, IgG, IL-2R and IFN-alpha correlated with disease activity. Immunofluorescent studies using frozen sections obtained from the dermal lesion showed no immunoglobulin or complement deposits on vascular walls. Measurements of serum IL-2R and IFN-alpha might be considered reliable serologic indicators of disease activity.
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Hayasaka T, Kobayashi S, Kamiya K. [A carcinoma of the cecum arising from the orifice of the appendix: a case report]. GAN NO RINSHO. JAPAN JOURNAL OF CANCER CLINICS 1990; 36:1053-8. [PMID: 2381050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reported is the case of a 50-year-old man who was admitted to hospital because of an abdominal pain. A barium enema revealed the shade of a distended, unfilled appendix that had reversed itself on the cecum and the ascending colon, the latter showing compression from the exterior. Further, a colonoscopic examination uncovered a flat, nodular tumor of the cecum that had elevated at the orifice of the vermiform appendix, and 67Ga scintigraphy indicated the uptake at the lower right abdomen. A resected specimen of the tumor showed proliferation in the cecal mucosa at the orifice of the appendix, causing an appendiceal abscess, and the histopathological findings revealed an adenocarcinoma of the cecal mucosa but no malignant transformation of the appendiceal mucosa.
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Itoh K, Hayasaka T, Kuwabara S, Sasaki H, Saito H. [Diffuse abdominal uptake of 67Ga-citrate; report of three cases]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1989; 34:1497-500. [PMID: 2593298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Three cases, two peritoneal lymphomatosis and one tuberculous peritonitis, which showed diffuse abdominal uptake of 67Ga-citrate, were reported. 67Ga scan should be indicated for patients suspected of malignancy or inflammation with a lack of localized symptoms and signs in the abdomen. 67Ga-citrate scan also can give notable information on the evaluation of therapeutic response in those patients.
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Hayasaka T. [Nurses in clinical settings: my impressions of reading the series]. [KANGO] JAPANESE JOURNAL OF NURSING 1987; 39:133-9. [PMID: 3446946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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41
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Kuwabara S, Hayasaka T, Kiyama Y, Takeda R, Yamazaki Y, Saitoh H, Itoh T. [Malignant lymphoma of the ileum]. GAN NO RINSHO. JAPAN JOURNAL OF CANCER CLINICS 1986; 32:2015-20. [PMID: 3468278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A 53-year-old man with malignant lymphoma of the ileum is reported. He was admitted to our hospital because of lower abdominal discomfort. 67Ga citrate radionuclide imaging revealed an abnormal round uptake in his lower abdomen. CT scans showed an abnormal soft tissue density mass and a remarkably dilated small intestine in the pelvis. X-ray studies of the small intestine revealed a giant diverticulum-like lesion. Angiograms showed a hypovascular tumor with irregularity of the small vessels. A resected specimen revealed non-Hodgkin's malignant lymphoma, diffuse large-cell type. 67Ga citrate radionuclide imaging was useful in screening for neoplastic lesions in the small intestine because of its easiness and safety.
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Nakajima T, Tanaka M, Hayasaka T, Miyake Y, Nakanishi Y, Sasamoto K. Airborne measurements of the optical stratification of aerosols in turbid atmospheres. APPLIED OPTICS 1986; 25:4374. [PMID: 18235794 DOI: 10.1364/ao.25.004374] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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43
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Hayasaka T, Kuwabara S, Mitani R, Saitoh H, Hashihata T, Itoh T. [A case report of early rectal carcinoma, IIa + IIc type, with no invasion of the submucosa]. GAN NO RINSHO. JAPAN JOURNAL OF CANCER CLINICS 1985; 31:889-93. [PMID: 4032765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A 66-year-old woman was admitted to the Hakodate Chuo Hospital because of abdominal discomfort. A barium enema study revealed a deformity of the middle Houston's valve of the rectum and granular lesions at the Rb region of the rectum. A colonoscopic examination showed the IIa + IIc type of early rectal carcinoma. A resected specimen also revealed IIa + IIc type early rectal carcinoma, 8 X 13 mm in diameter, and well-differentiated adenocarcinoma with no invasion of the submucosa. Infiltration into the lymphatic vessels and regional lymph node metastasis were not encountered. The deformity of the rectal Houston's valve was checked by a barium enema study. It should be emphasized that early detection of colorectal carcinoma with no invasion of the submucosa, requires careful barium enema studies and colonoscopic examination.
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Hayasaka T, Suzuki T. [Patient-nursing personnel relationship]. [KANGO GIJUTSU] : [NURSING TECHNIQUE] 1985; 31:725-6. [PMID: 3847577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Hayasaka T, Suzuki T. [Thanatos]. [KANGO GIJUTSU] : [NURSING TECHNIQUE] 1985; 31:740-1. [PMID: 3847584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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46
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Hayasaka T, Zamami M. [Oriental viewpoint of body and mind. 2]. KANGO TENBO. THE JAPANESE JOURNAL OF NURSING SCIENCE 1984; 9:523-9. [PMID: 6565136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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47
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Hayasaka T, Zamami M. [The Oriental viewpoint of body and mind (1)]. KANGO TENBO. THE JAPANESE JOURNAL OF NURSING SCIENCE 1984; 9:411-6. [PMID: 6564315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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48
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Kawabata H, Hayasaka T. [The body as the background to thinking. 2]. KANGO TENBO. THE JAPANESE JOURNAL OF NURSING SCIENCE 1984; 9:333-7. [PMID: 6563328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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49
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Hayasaka T, Kawabata H. [Body as the background of thinking]. KANGO TENBO. THE JAPANESE JOURNAL OF NURSING SCIENCE 1984; 9:241-6. [PMID: 6562314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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50
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Mito T, Hayasaka T. [Holistic viewpoint about man and 'science']. KANGO TENBO. THE JAPANESE JOURNAL OF NURSING SCIENCE 1984; 9:133-9. [PMID: 6561338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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