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    Application of CT in Diagnosing Carcinoma of the Maxillary Sinuses : PART 2: An Experimental Study of Pitfalls Encountered when Diagnosing Carcinoma of the Maxillary Sinuses with CT

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    1982-03A phantom simulating the transverse section of the maxillary sinuses was constructed for experimentation with various CT scanners to study the following: (1) the occasional inability to image the very thin posterior-lateral walls which have no real bone defects, and (2) to verify whether or not the bony walls surrounding the maxillary sinuses are actually as thick as they appear on CT. The phantom was made of an acrylic cylinder containing three cavities simulating the maxillary sinuses and the nasal cavity and filled with water. The walls, made of thin aluminum and acrylic plates and placed between water and air, disappeared in some CT images. The thickness of the walls calculated from CT values was greater than the true thickness imaged by each CT scanner. The author stresses that in CT images, either experimentally or clinically, thin bony walls placed between water and air or fat tend to disappear, and that bony walls tend to appear thicker than their true thickenss.departmental bulletin pape

    Abacarus aralioidus Huang, 2006, sp. nov.

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    Abacarus aralioidus sp. nov. (Fig. 2) Female: Body spindle­shaped, 156 long, shield 48 long, 55 wide, shield lobe present, shield design with median line from base to basal 4 / 5, with many dashed lines at anterior; admedian lines semicircular­like, with granules at base, scapular tubercles set at rear shield margin, setae (sc) 9 long, directed to rear, Dt­Dt 21 apart; leg segments normal, fore tibial setae (1 ') set at 1 / 2, 6 long; coxal area with several granules; 1 st coxal setae (1 b) 5 long, Ct 1 ­Ct 1 15 apart, 2 nd coxal setae (1 a) 10 long, Ct 2 ­Ct 2 7 apart, 3 rd coxal setae (2 a) 11 long, Ct 3 ­Ct 3 22 apart, Ct 1 \Ct 2 13, Ct 1 ­Ct 2 7, Ct 2 \Ct 3 15, Ct 2 ­Ct 3 8; claw ending as knob; empodium simple, 5 rayed. Opisthosoma: dorsum with median ridge shorter than submedian ridges, 1 st dorsal annulus broad, dorsal annuli with about 33 annuli, with spiny microtubercles at median ridge, 1 st 3 dorsal annuli 14 long, ventral annuli with about 58 microtuberculate rings; lateral setae (c 2) 11 long, Lt­Lt 52 apart, Lt\Vt 1 46, Lt­Vt 1 24; 1 st ventral setae (d) 23 long, Vt 1 ­Vt 1 31 apart, Vt 1 \Vt 2 27, Vt 1 ­Vt 2 24; 2 nd ventral setae (e) 8 long, Vt 2 ­Vt 2 10 apart, Vt 2 \Vt 3 40, Vt 2 ­Vt 3 36; 3 rd ventral setae (f) 7 long, Vt 3 ­Vt 3 8 apart; accessory setae (h 1) absent. Epigynium: 21 wide, 14 long, with about 12 longitudinal ridges, with dashed lines at base, genital setae (3 a) 9 long, Gt­Gt 13 apart. Male: not seen. Type data: Holotype female, TAICHUNG: Hoping, 31 ­Oct.­ 1996, K. W. Huang; ex Trochodendron aralioides S. et Z. (Trochodendraceae). (deposited at NMNS). Paratypes, 2 females, data same as for holotype. Relation to host: A vagrant on the lower leaf surface. No apparent damage was observed. Note: This new species is close to A. bambusae (Channabasavanna, 1966) Keifer, 1944 but differs in the shield design with a semicircular­like admedian lines, lacking transverse line between admedian lines, and the 5 ­rayed empodium.Published as part of Huang, Kun-Wei, 2006, Eriophyoid mites (Acari: Eriophyoidea) on Trochodendron aralioides (Trochodendraceae) from Taiwan, pp. 63-68 in Zootaxa 1141 on page 66, DOI: 10.5281/zenodo.17207
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