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Ulf Welander

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Gang Li; Per-Erik Engström; Ulf Welander
Measurement accuracy of marginal bone level in digital radiographs with and without color coding.
Gang Li; Per-Erik Engström; K Nasström; Z Y Lü; G C H Sanderink; Ulf Welander
Marginal bone levels measured in film and digital radiographs corrected for attenuation and visual response: an in vivo study.
Xie-Qi Shi; G Li; K Yoshiura; Ulf Welander
Perceptibility curve test for conventional and colour-coded radiographs.

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All Publications

2007: Gang Li; Per-Erik Engström; Ulf Welander
Measurement accuracy of marginal bone level in digital radiographs with and without color coding.
Acta odontologica Scandinavica 2007;65(5):254-8.
2007: Gang Li; Per-Erik Engström; K Nasström; Z Y Lü; G C H Sanderink; Ulf Welander
Marginal bone levels measured in film and digital radiographs corrected for attenuation and visual response: an in vivo study.
Dento maxillo facial radiology 2007;36(1):7-11.
2004: Xie-Qi Shi; G Li; K Yoshiura; Ulf Welander
Perceptibility curve test for conventional and colour-coded radiographs.
Dento maxillo facial radiology 2004;33(5):318-22.
2004: Ulf Welander; G Li; WD McDavid; Gunilla Tronje
Transtomography: a new tomographic scanning technique.
Dento maxillo facial radiology 2004;33(3):188-95.
2004: Mihalis Mastoris; K Yoshiura; Ulf Welander; Kostas Tsiklakis; E Papadakis; G Li
Psychophysical properties of a new F-speed intraoral film.
Dento maxillo facial radiology 2004;33(3):158-63.
2004: Kazunori Yoshiura; Ulf Welander; WD McDavid; Gang Li; Xie-Qi Shi; Eiji Nakayama; Mayumi Shimizu; Kazutoshi Okamura; Shigenobu Kanda
Comparison of the psychophysical properties of various intraoral film and digital systems by means of the perceptibility curve test.
Dento maxillo facial radiology 2004;33(2):98-102.
2004: Mihalis Mastoris; Gang Li; Ulf Welander; WD McDavid
Determination of the resolution of a digital system for panoramic radiography based on CCD technology.
Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics 2004;97(3):408-14.
2004: Gang Li; G C H Sanderink; Ulf Welander; WD McDavid; K Näsström
Evaluation of endodontic files in digital radiographs before and after employing three image processing algorithms.
Dento maxillo facial radiology 2004;33(1):6-11.
2003: Ann-Catherine Mörner-Svalling; Gunilla Tronje; Lars Andersson; Ulf Welander
Comparison of the diagnostic potential of direct digital and conventional intraoral radiography in the evaluation of peri-implant conditions.
Clinical oral implants research 2003;14(6):714-9.
2003: Gang Li; Ulf Welander; Kazunori Yoshiura; Xie-Qi Shi; WD McDavid
Perceptibility curve test for digital radiographs before and after correction for attenuation and correction for attenuation and visual response.
Dento maxillo facial radiology 2003;32(6):372-8.
2003: Kazunori Yoshiura; Ulf Welander; WD McDavid; Gang Li; Xie-Qi Shi; Toshiyuki Kawazu; M Tatsumi; T Matsuo; Shigenobu Kanda
Perceptibility curves for the Digora system.
Dento maxillo facial radiology 2003;32(3):191-7.
2002: Gang Li; Kazunori Yoshiura; Ulf Welander; P Sällstrom; WD McDavid
Visual linearization of the display of digital radiographs.
Dento maxillo facial radiology 2002;31(2):131-6.
2002: Gang Li; Kazunori Yoshiura; Ulf Welander; Xie-Qi Shi; WD McDavid
Detection of approximal caries in digital radiographs before and after correction for attenuation and visual response. An in vitro study.
Dento maxillo facial radiology 2002;31(2):113-6.
2001: Per-Erik Engström; Xie-Qi Shi; Gunilla Tronje; A Larsson; Ulf Welander; L Frithiof; G N Engstrom
The effect of hyaluronan on bone and soft tissue and immune response in wound healing.
Journal of periodontology 2001;72(9):1192-200.
2001: Kazunori Yoshiura; Ulf Welander; Xie-Qi Shi; Gang Li; Toshiyuki Kawazu; M Tatsumi; Kazutoshi Okamura; WD McDavid; Shigenobu Kanda
Conventional and predicted perceptibility curves for contrast-enhanced direct digital intraoral radiographs.
Dento maxillo facial radiology 2001;30(4):219-25.
2001: Hans Ulrik Paulsen; Xie-Qi Shi; Ulf Welander; J Huggare; F Scheutz
Eruption pattern of autotransplanted premolars visualized by radiographic color-coding.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 2001;119(4):338-45.
2001: Xie-Qi Shi; P Han; Ulf Welander; Birgit Angmar-Månsson
Tuned-aperture computed tomography for detection of occlusal caries.
Dento maxillo facial radiology 2001;30(1):45-9.
2000: Xie-Qi Shi; Ulf Welander; Birgit Angmar-Månsson
Occlusal caries detection with KaVo DIAGNOdent and radiography: an in vitro comparison.
Caries research 2000;34(2):151-8.
2000: Yoshihiko Hayakawa; Hiromi Kitagawa; Mamoru Wakoh; Kinya Kuroyanagi; Ulf Welander
Assessing the image quality of a CCD-based digital intraoral radiography system: application of perceptibility curve test.
The Bulletin of Tokyo Dental College 2000;41(1):9-14.
2000: HC Stamatakis; Ulf Welander; WD McDavid
Physical properties of a photostimulable phosphor system for intra-oral radiography.
Dento maxillo facial radiology 2000;29(1):28-34.
1999: Yoshihiko Hayakawa; Kinya Kuroyanagi; S K Chen; Allan G Farman; Ulf Welander
An electronic survey of opinions on the compatibility of current X-ray generators with intra-oral digital X-ray systems.
Dento maxillo facial radiology 1999;28(6):344-7.
1999: Kazunori Yoshiura; HC Stamatakis; Ulf Welander; WD McDavid; Xie-Qi Shi; S Ban; Toshiyuki Kawazu; M Tatsumi; Shigenobu Kanda
Physical evaluation of a system for direct digital intra-oral radiography based on a charge-coupled device.
Dento maxillo facial radiology 1999;28(5):277-83.
1999: HC Stamatakis; Ulf Welander; WD McDavid
Dose response of a storage phosphor system for intraoral radiography.
Dento maxillo facial radiology 1999;28(5):272-6.
1999: Kazunori Yoshiura; HC Stamatakis; Ulf Welander; WD McDavid; Xie-Qi Shi; S Ban; Toshiyuki Kawazu; Toru Chikui; Shigenobu Kanda
Prediction of perceptibility curves of direct digital intraoral radiographic systems.
Dento maxillo facial radiology 1999;28(4):224-31.
1999: S Papika; Hans Ulrik Paulsen; Xie-Qi Shi; Ulf Welander; S Linder-Aronson
Orthodontic application of color image addition to visualize differences between sequential radiographs.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 1999;115(5):488-93.
1999: HC Stamatakis; Kazunori Yoshiura; Xie-Qi Shi; Ulf Welander; WD McDavid
A simplified method to obtain perceptibility curves for direct dental digital radiography.
Dento maxillo facial radiology 1999;28(2):112-5.
1999: Xie-Qi Shi; I Eklund; Gunilla Tronje; Ulf Welander; HC Stamatakis; Per-Erik Engström; Gunilla Norhagen Engström
Comparison of observer reliability in assessing alveolar bone changes from color-coded with subtraction radiographs.
Dento maxillo facial radiology 1999;28(1):31-6.
1998: Kazunori Yoshiura; HC Stamatakis; Xie-Qi Shi; Ulf Welander; WD McDavid; J Kristoffersen; Gunilla Tronje
The perceptibility curve test applied to direct digital dental radiography.
Dento maxillo facial radiology 1998;27(3):131-5.
1997: Björn Svenson; Ulf Welander; Xie-Qi Shi; HC Stamatakis; Gunilla Tronje
A sensitometric comparison of four dental X-ray films and their diagnostic accuracy.
Dento maxillo facial radiology 1997;26(4):230-5.
1995: Ulf Welander; WD McDavid; A C Mörner; Gunilla Tronje; O Tokuoka; H Fuchihata; P Nelvig; S B Dove
Absolute measures of image quality for the Sens-A-Ray direct digital intraoral radiography system.
Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics 1995;80(3):345-50.
1995: WD McDavid; Ulf Welander; S Brent Dove; G Tronjje
Digital imaging in rotational panoramic radiography.
Dento maxillo facial radiology 1995;24(2):68-75.
1994: WD McDavid; Ulf Welander; G C Sanderink; S B Dove; Gunilla Tronje
A simple method for measuring MTF in direct digital intraoral radiography. Technical note.
Oral surgery, oral medicine, and oral pathology 1994;78(6):802-5.
1994: Björn Svenson; Ulf Welander; G Anneroth; B Söderfeldt
Exposure parameters and their effects on diagnostic accuracy.
Oral surgery, oral medicine, and oral pathology 1994;78(4):544-50.
1994: Ulf Welander; I Eklund; Gunilla Tronje; WD McDavid; S B Dove; R Mähler; C D Wilcox; A C Mörner; A Uddhammar
Color coding of radiographic changes over time by means of image addition.
Oral surgery, oral medicine, and oral pathology 1994;78(4):531-8.
1994: G C Sanderink; R Huiskens; Paul van der Stelt; Ulf Welander; S E Stheeman
Image quality of direct digital intraoral x-ray sensors in assessing root canal length. The RadioVisioGraphy, Visualix/VIXA, Sens-A-Ray, and Flash Dent systems compared with Ektaspeed films.
Oral surgery, oral medicine, and oral pathology 1994;78(1):125-32.
1994: Ulf Welander; WD McDavid; G C Sanderink; Gunilla Tronje; A C Mörner; S B Dove
Resolution as defined by line spread and modulation transfer functions for four digital intraoral radiographic systems.
Oral surgery, oral medicine, and oral pathology 1994;78(1):109-15.
1993: William C Scarfe; Pirkka Nummikoski; WD McDavid; Ulf Welander; Gunilla Tronje
Radiographic interproximal angulations: implications for rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1993;76(5):664-72.
1993: M Shiojima; A Bäckström; Ulf Welander; WD McDavid; Gunilla Tronje; Munetaka Naitoh
Layer thickness in panoramic radiography as defined by different noise-equivalent passbands.
Oral surgery, oral medicine, and oral pathology 1993;76(2):244-50.
1993: WD McDavid; S B Dove; Ulf Welander; Gunilla Tronje
Dimensional reproduction in direct digital rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1993;75(4):523-7.
1993: Ulf Welander; P Nelvig; Gunilla Tronje; WD McDavid; S B Dove; A C Mörner; T Cederlund
Basic technical properties of a system for direct acquisition of digital intraoral radiographs.
Oral surgery, oral medicine, and oral pathology 1993;75(4):506-16.
1992: P Nelvig; K Wing; Ulf Welander
Sens-A-Ray. A new system for direct digital intraoral radiography.
Oral surgery, oral medicine, and oral pathology 1992;74(6):818-23.
1992: WD McDavid; S B Dove; Ulf Welander; Gunilla Tronje
Direct digital extraoral radiography of the head and neck with a solid-state linear x-ray detector.
Oral surgery, oral medicine, and oral pathology 1992;74(6):811-7.
1992: M D Lee; RG Waggener; WD McDavid; S B Dove; Ulf Welander; Gunilla Tronje
CT reconstruction algorithm for a dental panoramic x-ray unit.
Physics in medicine and biology 1992;37(12):2161-74.
1992: S B Dove; WD McDavid; Ulf Welander; Gunilla Tronje; C D Wilcox
Design and implementation of an image management and communications system (IMACS) for dentomaxillofacial radiology.
Dento maxillo facial radiology 1992;21(4):216-21.
1992: S B Dove; WD McDavid; Ulf Welander; Gunilla Tronje
Preliminary evaluation of a digital system for rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1992;73(5):623-32.
1991: WD McDavid; S B Dove; Ulf Welander; Gunilla Tronje
Electronic system for digital acquisition of rotational panoramic radiographs.
Oral surgery, oral medicine, and oral pathology 1991;71(4):499-502.
1990: Hans-Göran Gröndahl; M Rohlin; Ulf Welander; K Wing
[Dental care of the future demands high quality radiographic diagnosis].
Tandläkartidningen 1990;82(20):1065-70.
1990: G C Sanderink; Ulf Welander; WD McDavid; Gunilla Tronje
Applicability of simultaneous rotational panoramic radiography.
Dento maxillo facial radiology 1990;19(3):109-12.
1990: WD McDavid; Gunilla Tronje; Ulf Welander
Reversed layer position in rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1990;69(2):253-7.
1990: WD McDavid; Gunilla Tronje; Ulf Welander
Nonrotational scanning in panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1990;69(1):108-12.
1989: A Bäckstrom; Ulf Welander; WD McDavid; Gunilla Tronje; G C Sanderink
The effect of system parameters on resolution in rotational panoramic radiography. A mathematical analysis.
Dento maxillo facial radiology 1989;18(4):169-76.
1989: WD McDavid; Gunilla Tronje; Ulf Welander
A method to maintain a constant magnification factor throughout the exposure of rotational panoramic radiographs.
Dento maxillo facial radiology 1989;18(4):160-8.
1989: Ulf Welander; Gunilla Tronje; WD McDavid
Layer thickness in rotational panoramic radiography: some specific aspects.
Dento maxillo facial radiology 1989;18(3):119-24.
1989: Ulf Welander; Pirkka Nummikoski; Gunilla Tronje; WD McDavid; P E Legrell; Robert P Langlais
Standard forms of dentition and mandible for applications in rotational panoramic radiography.
Dento maxillo facial radiology 1989;18(2):60-7.
1989: WD McDavid; Gunilla Tronje; Ulf Welander
Image layers in the Zonarc.
Dento maxillo facial radiology 1989;18(1):1-10.
1988: J Ahlqvist; S Eliasson; Ulf Welander
The effect of projection errors on angular measurements in cephalometry.
European journal of orthodontics 1988;10(4):353-61.
1988: S J Gibbs; A Pujol; WD McDavid; Ulf Welander; Gunilla Tronje
[Patient risks from panoramic X-rays].
ZWR 1988;97(9):782-6.
1988: Pirkka Nummikoski; T Prihoda; Robert P Langlais; WD McDavid; Ulf Welander; Gunilla Tronje
Dental and mandibular arch widths in three ethnic groups in Texas: a radiographic study.
Oral surgery, oral medicine, and oral pathology 1988;65(5):609-17.
1988: S J Gibbs; A Pujol; WD McDavid; Ulf Welander; Gunilla Tronje
Patient risk from rotational panoramic radiography.
Dento maxillo facial radiology 1988;17(1):25-32.
1987: Ulf Welander; WD McDavid; Gunilla Tronje; C R Morris
An analysis of different planes within the image layer in rotational panoramic radiography.
Dento maxillo facial radiology 1987;16(2):79-84.
1986: J Ahlqvist; S Eliasson; Ulf Welander
The effect of projection errors on cephalometric length measurements.
European journal of orthodontics 1986;8(3):141-8.
1986: WD McDavid; Gunilla Tronje; Ulf Welander; C R Morris
Dimensional reproduction in rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1986;62(1):96-101.
1986: WD McDavid; C R Morris; Gunilla Tronje; Ulf Welander
Resolution of several screen-film combinations in rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1986;61(6):629-34.
1985: B J Glass; WD McDavid; Ulf Welander; C R Morris
The central plane of the image layer determined experimentally in various rotational panoramic x-ray machines.
Oral surgery, oral medicine, and oral pathology 1985;60(1):104-12.
1984: WD McDavid; Ulf Welander; H Kanerva; Gunilla Tronje; C R Morris
Definitions of unsharpness and layer thickness in rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1984;57(1):96-101.
1983: Ulf Welander; W D McDavid; N M Higgins; C R Morris
The effect of viewing conditions on the perceptibility of radiographic details.
Oral surgery, oral medicine, and oral pathology 1983;56(6):651-4.
1983: WD McDavid; Ulf Welander; H Kanerva; C R Morris
Transfer function analysis in rotational panoramic radiography.
Acta radiologica: diagnosis 1983;24(1):27-32.
1983: Ulf Welander; W D McDavid; C R Morris
A method of increasing the anterior layer thickness in rotational panoramic radiography.
Dento maxillo facial radiology 1983;12(2):133-6.
1983: W D McDavid; Robert P Langlais; Ulf Welander; C R Morris
Real, double, and ghost images in rotational panoramic radiography.
Dento maxillo facial radiology 1983;12(2):122-8.
1983: J Ahlqvist; S Eliasson; Ulf Welander
The cephalometric projection. Part II. Principles of image distortion in cephalography.
Dento maxillo facial radiology 1983;12(2):101-8.
1982: W D McDavid; Ulf Welander; B K Pillai; C R Morris
The Intrex--a constant-potential x-ray unit for periapical dental radiography.
Oral surgery, oral medicine, and oral pathology 1982;53(4):433-6.
1982: Gunilla Tronje; Ulf Welander; WD McDavid; C R Morris
Image distortion in rotational panoramic radiography. VI. Distortion effects in sliding systems.
Acta radiologica: diagnosis 1982;23(2):153-60.
1982: S Eliasson; Ulf Welander; J Ahlqvist
The cephalographic projection. Part I: General considerations.
Dento maxillo facial radiology 1982;11(2):117-22.
1982: W D McDavid; Ulf Welander; C R Morris
Blurring effects in rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1982;53(1):111-5.
1981: WD McDavid; Gunilla Tronje; Ulf Welander; C R Morris
Effects of errors in film speed and beam alignment on the image layer in rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1981;52(5):561-4.
1981: W D McDavid; Ulf Welander; C R Morris
A new method for image layer analysis in rotational panoramic radiography.
Oral surgery, oral medicine, and oral pathology 1981;52(2):213-20.
1981: Gunilla Tronje; Ulf Welander; WD McDavid; C R Morris
Image distortion in rotational panoramic radiography. IV. Object morphology; outer contours.
Acta radiologica: diagnosis 1981;22(6):689-96.
1981: Gunilla Tronje; Ulf Welander; WD McDavid; C R Morris
Image distortion in rotational panoramic radiography. III. Inclined objects.
Acta radiologica: diagnosis 1981;22(5):585-92.
1981: Gunilla Tronje; Sören Eliasson; Per Julin; Ulf Welander
Image distortion in rotational panoramic radiography. II. Vertical distances.
Acta radiologica: diagnosis 1981;22(4):449-55.
1981: Gunilla Tronje; Ulf Welander; WD McDavid; C R Morris
Image distortion in rotational panoramic radiography. I. General considerations.
Acta radiologica: diagnosis 1981;22(3A):295-9.