  The electromagnetic structure of the baryons is modified in the nuclear
medium. The modifications can be inferred from the comparison between the
electromagnetic form factors in medium with the respective form factor in
vacuum. Of particular interest is the ratio between the electric and magnetic
form factors in medium ($G_E^*/G_M^*$) and vacuum ($G_E/G_M$) of the octet
baryon. The deviation of the double ratios ($G_E^*/G_M^*)/(G_E/G_M)$ from unity
measures the impact of the medium modification of the electromagnetic structure
in a nuclear medium. Measurements of the double ratios
$(G_E^*/G_M^*)/(G_E/G_M)$ for different nuclear densities may become available
in a near future using the polarization-transfer method developed at Jefferson
Lab. We present estimates of the double ratios of octet baryons based on a
covariant constituent quark model, which takes into account pion cloud
excitations of the baryon cores,for different nuclear densities. Our results
manifest different features, namely, enhancement or quenching depending on the
baryon flavor content.
