Can u give me all b scan pics from diagnostic procedures in ophthalmology text from pg number 242 to 257 please
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"page:24" in /textbooks/9781975160753
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I now have all the available B-scan images from the library. Let me present a clear response to the user.
Important note: The specific textbook you're asking about - "Diagnostic Procedures in Ophthalmology" (commonly by HV Nema / Nitin Nema) - is not available in this library's collection. The library only has two ophthalmology textbooks:
- Kanski's Clinical Ophthalmology, 10th Edition
- The Wills Eye Manual, 7th Edition
Neither of these has pages 242-257 covering a dedicated B-scan chapter.
That said, here are all the B-scan ultrasound images available from the ophthalmology textbooks in this library:
B-Scan Ultrasonography Images
From The Wills Eye Manual - Section 14.8: Ophthalmic Ultrasonography
FIGURE 14.8.2 - Normal B-scan ultrasonography (p. 1093)
Normal B-scan: fan-shaped two-dimensional cross-sectional image of the globe showing the posterior aspect of the lens and vitreous cavity through to the posterior wall.
From Kanski's Clinical Ophthalmology, 10th Edition - Chapter 16: Retinal Detachment / Ultrasonography
Fig. 16.5A - Technique of ultrasonography
Examiner performing B-scan with probe on the patient's closed eyelid, with the real-time image displayed on a monitor. (Courtesy of P Terry.)
Fig. 16.5B - B-scan ultrasonogram showing retinal detachment
B-scan showing a detached retina as a bright echogenic membrane within the vitreous cavity.
Fig. 16.6A - Technique diagram: Vertical scanning
Diagram showing vertical B-scan scanning technique with the marker pointing towards the brow (12 o'clock), producing a vertical cross-section of the fundus through the optic disc.
To get pages 242-257 specifically from "Diagnostic Procedures in Ophthalmology" (Nema), that textbook is not in this library's collection. If you have a physical copy or PDF, I can help you work through its content. Alternatively, if you're looking for a particular pathology's B-scan appearance (e.g., retinal detachment, choroidal melanoma, vitreous hemorrhage, optic disc drusen), I can pull those specific B-scan images from Kanski's or Wills Eye Manual.
Search for B-scan images of specific pathologies (melanoma, RD, hemorrhage, etc.)
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I now have a comprehensive collection of B-scan images across all major pathologies. Here is the complete organized gallery:
B-Scan Ultrasonography - Pathology Gallery
Sources: Kanski's Clinical Ophthalmology 10th Ed. & The Wills Eye Manual
1. Retinal Detachment (RD)
Rhegmatogenous Retinal Detachment - B-scan (Wills Eye Manual, Fig. 11.3.3, p. 765)
Echogenic, undulating retinal membrane elevated from the posterior wall. The retina inserts at the optic disc and ora serrata. Highly mobile on dynamic scanning.
Tractional Retinal Detachment - B-scan (Kanski's, Fig. 16.34B, p. 706)
Tented, concave configuration with reduced mobility. No break seen. SRF shallower than in rhegmatogenous RD and seldom extends to the ora serrata.
2. Vitreous Haemorrhage
Vitreous Haemorrhage with Flat Retina - B-scan (Kanski's, Fig. 17.1C, p. 716)
Diffuse mid-vitreous echoes from cellular aggregates within the vitreous cavity. The posterior wall (retina/choroid) is flat and intact.
Vitreous Haemorrhage with Underlying Retinal Detachment - B-scan (Kanski's, Fig. 17.1D, p. 716)
Dense vitreous echoes with an underlying elevated retinal membrane. B-scan is critical in VH to exclude an underlying RD or choroidal melanoma when media is opaque.
3. Choroidal Melanoma
Dome-Shaped Choroidal Melanoma with Choroidal Excavation - B-scan (Kanski's, Fig. 20.28B, p. 883)
Dome-shaped echogenic mass arising from the posterior choroid with characteristic acoustic hollowness (choroidal excavation) - the tumour interior is relatively echo-poor due to low internal reflectivity.
Collar-Stud Choroidal Melanoma with Combined A/B-scan (Kanski's, Fig. 20.28C, p. 883)
'Collar stud' (mushroom) shape where tumour has broken through Bruch's membrane. Combined B-scan (top) and A-scan (bottom) showing characteristically low internal reflectivity on A-scan - a key diagnostic feature of uveal melanoma.
4. Posterior Scleritis
Posterior Scleritis - 'T-sign' - B-scan (Kanski's, Fig. 9.12, p. 380)
Arrow points to sub-Tenon fluid. The sclera is thickened and the optic nerve shadow (vertical) combined with the fluid-filled sub-Tenon space (horizontal) creates the pathognomonic "T-sign."
5. Retinoblastoma (Calcification)
Retinoblastoma - B-scan showing calcification echoes (Kanski's, Fig. 20.40E, p. 894)
Highly echogenic foci with posterior acoustic shadowing representing calcification within the tumour mass - calcification on B-scan (and CT) is virtually pathognomonic of retinoblastoma in a child.
Summary Table
| Pathology | Key B-scan Feature |
|---|---|
| Rhegmatogenous RD | Mobile, undulating echogenic membrane anchored at disc/ora |
| Tractional RD | Tented concave membrane, immobile, no break |
| Vitreous haemorrhage (flat retina) | Diffuse mid-vitreous echoes, flat posterior wall |
| Vitreous haemorrhage + RD | Echoes + elevated membrane behind - always scan VH to exclude RD |
| Choroidal melanoma (dome) | Acoustic hollowness (choroidal excavation), low internal A-scan reflectivity |
| Choroidal melanoma (collar-stud) | Mushroom shape through Bruch's membrane, low internal reflectivity |
| Posterior scleritis | Scleral thickening + sub-Tenon fluid = T-sign |
| Retinoblastoma | Bright hyperechoic foci with acoustic shadow (calcification) |
- Kanski's Clinical Ophthalmology, 10th Ed. | The Wills Eye Manual, 7th Ed.
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