Table 1:

Parameters and possible findings in visual assessment of placental antenatal magnetic resonance imaging

Parameter assessed	Possible findings
Placental Site	Anterior, posterior, lateral, fundal High, low lying, praevia (Figure 5) Extra lobes
Placental Shape	Discoid, bilobed, succenturiate (Figure 3)
Umbilical cord appearances and insertion site	Vasa praevia, two vessel umbilical cord
Amniotic fluid volume	Oligohyramnios, anhydramnios, polyhydramnios The amniotic fluid index can be calculated using the sagittal plane and four quadrant deepest pools, measured in a way similar to that used in ultrasound.
Placental surface	Contraction (Figure 3)
Placental parenchyma	Lobularity, size and number of lobules Granularity. High granularity is defined as the presence of both high and low signal intensity within individual lobules. Presence of substantial low signal intensity areas Maturation appropriate for gestational age (Figure 2)
Cervix	Distance of most distal placental margin from inner cervical os Cervical length, cervical funnelling (cervical widening at the internal cervical os, best demonstrated in the maternal sagittal plane (Figure 5)).